| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/16/1966 | Was | Lines | Promoted to active roster |   |   | Before |
| 4/18/1966 | NYA | Amaro | Placed on disabled list |   |   | Before |
| 4/21/1966 | ChN | Buhl | Traded away | Phi |   | Before |
| 4/21/1966 | ChN | Herrnstein | Acquired via trade | Phi |   | Before |
| 4/21/1966 | ChN | Jackson | Traded away | Phi |   | Before |
| 4/21/1966 | ChN | Jenkins | Acquired via trade | Phi |   | Before |
| 4/21/1966 | ChN | Phillips | Acquired via trade | Phi |   | Before |
| 4/21/1966 | Phi | Buhl | Acquired via trade | ChN |   | Before |
| 4/21/1966 | Phi | Herrnstein | Traded away | ChN |   | Before |
| 4/21/1966 | Phi | Jackson,L | Acquired via trade | ChN |   | Before |
| 4/21/1966 | Phi | Jenkins | Traded away | ChN |   | Before |
| 4/21/1966 | Phi | Phillips | Traded away | ChN |   | Before |
| 4/23/1966 | ChN | Kuenn | Traded away | Phi |   | Before |
| 4/23/1966 | Phi | Jackson,G | Demoted to reserve roster |   |   | Before |
| 4/23/1966 | Phi | Kuenn | Acquired via trade | ChA |   | Before |
| 4/25/1966 | Bos | Bennett | Placed on disabled list |   |   | Before |
| 4/25/1966 | Was | Hannan | Promoted to active roster |   |   | Before |
| 4/25/1966 | Was | Narum | Demoted to reserve roster |   |   | Before |
| 4/26/1966 | ChA | Voss | Demoted to reserve roster |   |   | Before |
| 4/26/1966 | ChA | Wilhelm | Placed on disabled list |   |   | Before |
| 4/26/1966 | Det | Navarro | Demoted to reserve roster |   |   | Before |
| 4/26/1966 | LA | Gilliam | Signed |   |   | Before |
| 4/26/1966 | Pit | Law | Placed on disabled list |   |   | Before |
| 4/26/1966 | Was | Cheney | Promoted to active roster |   |   | Before |
| 4/28/1966 | Atl | Garrett | Demoted to reserve roster |   |   | After |
| 4/28/1966 | ChA | Elia | Demoted to reserve roster |   |   | Before |
| 4/29/1966 | ChN | Cline | Demoted to reserve roster |   |   | Before |
| 4/29/1966 | ChN | Pena | Demoted to reserve roster |   |   | Before |
| 4/29/1966 | Was | Cunningham | Released |   |   | Before |
| 5/1/1966 | ChN | Connors | Promoted to active roster |   |   | Before |
| 5/1/1966 | ChN | Koonce | Demoted to reserve roster |   |   | Before |
| 5/2/1966 | Was | Brumley | Demoted to reserve roster |   |   | Before |
| 5/2/1966 | Was | Casanova | Promoted to active roster |   |   | Before |
| 5/2/1966 | Was | Closter | Demoted to reserve roster |   |   | Before |
| 5/2/1966 | Was | French | Promoted to active roster |   |   | Before |
| 5/5/1966 | Cin | Nuxhall | Placed on disabled list |   |   | Before |
| 5/5/1966 | Cle | Brown | Placed on disabled list |   |   | Before |
| 5/5/1966 | NYA | Murcer | Demoted to reserve roster |   |   | After |
| 5/6/1966 | Bos | Horton | Demoted to reserve roster |   |   | Before |
| 5/6/1966 | Hou | Bruce | Placed on disabled list |   |   | Before |
| 5/6/1966 | Hou | Mantilla | Activated from disabled list |   |   | Before |
| 5/6/1966 | NYA | Cullen | Demoted to reserve roster |   |   | Before |
| 5/7/1966 | Cal | Bailey | Released |   |   | Before |
| 5/7/1966 | ChN | Boccabella | Placed on disabled list |   |   | Before |
| 5/8/1966 | SF | Cepeda | Traded away | StL |   | After |
| 5/8/1966 | SF | Sadecki | Acquired via trade | StL |   | After |
| 5/8/1966 | StL | Cepeda | Acquired via trade | SF |   | After |
| 5/8/1966 | StL | Sadecki | Traded away | SF |   | After |
| 5/10/1966 | Atl | Hippauf | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | Cal | Montanez | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | Cal | Rubio | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | Det | Fox | Traded away | Phi |   | Before |
| 5/10/1966 | Det | Podres | Acquired via trade | LA |   | Before |
| 5/10/1966 | Hou | Carpin | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | Hou | Harrison | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | Hou | Sembera | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | KC | Fazio | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | KC | Hickman | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | LA | Podres | Traded away | Det |   | Before |
| 5/10/1966 | Phi | Fox | Acquired via trade | Det |   | Before |
| 5/10/1966 | Phi | Wagner | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | Pit | Walker | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | StL | Aust | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | StL | Jaster | Demoted to reserve roster |   |   | Before |
| 5/10/1966 | StL | Kernek | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | Bal | Roznovsky | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | Bal | Lau | Placed on disabled list |   |   | After |
| 5/11/1966 | Bos | Grilli | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | Bos | Magrini | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | ChN | Covington | Released |   |   | Before |
| 5/11/1966 | Cin | May | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | Cin | Tsitouris | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | Cle | Banks | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | Cle | Davis | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | Det | Hiller | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | KC | Jimenez | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | KC | Nossek | Acquired via trade | Min |   | Before |
| 5/11/1966 | Min | Nossek | Traded away | KC |   | Before |
| 5/11/1966 | Min | Uhlaender | Demoted to reserve roster |   |   | Before |
| 5/11/1966 | NYA | Schofield | Acquired via trade | SF |   | Before |
| 5/11/1966 | SF | Schofield | Traded away | NYA |   | Before |
| 5/11/1966 | Was | Cheney | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | LA | Willhite | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | NYN | Coleman | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | NYN | Klimchock | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | NYN | Sutherland | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | Phi | Boozer | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | Phi | Ridzik | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | Pit | Roberts | Demoted to reserve roster |   |   | Before |
| 5/12/1966 | SF | Hiatt | Demoted to reserve roster |   |   | Before |
| 5/14/1966 | ChN | Thomas,F | Signed |   |   | Before |
| 5/14/1966 | Det | Stanley | Placed on disabled list |   |   | After |
| 5/14/1966 | NYN | Hickman | Placed on disabled list |   | 5/12/1966 | Before |
| 5/17/1966 | Hou | Monteagudo | Claimed on waivers |   |   | Before |
| 5/17/1966 | KC | Monteagudo | Waived |   |   | Before |
| 5/17/1966 | Was | Orsino | Placed on disabled list |   |   | Before |
| 5/18/1966 | Hou | Heath | Demoted to reserve roster |   |   | Before |
| 5/18/1966 | NYN | McGraw | Placed on disabled list |   |   | Before |
| 5/18/1966 | Pit | Law | Activated from disabled list |   |   | Before |
| 5/18/1966 | StL | Johnson | Demoted to reserve roster |   |   | Before |
| 5/18/1966 | StL | Tolan | Promoted to active roster |   |   | Before |
| 5/20/1966 | Cin | Arrigo | Traded away | NYN |   | Before |
| 5/20/1966 | Cin | Nuxhall | Activated from disabled list |   |   | Before |
| 5/20/1966 | NYN | Arrigo | Acquired via trade | Cin |   | Before |
| 5/22/1966 | NYN | Taylor | Promoted to active roster |   |   | Before |
| 5/25/1966 | Hou | Sims | Demoted to reserve roster |   |   | Before |
| 5/25/1966 | Hou | Taylor | Activated from disabled list |   |   | Before |
| 5/25/1966 | LA | Oliver | Placed on disabled list |   |   | Before |
| 5/25/1966 | Phi | Craig | Placed on disabled list |   | 5/22/1966 | Before |
| 5/25/1966 | Was | Bosman | Promoted to active roster |   |   | Before |
| 5/26/1966 | ChA | Elia | Promoted to active roster |   |   | Before |
| 5/26/1966 | ChA | Hansen | Placed on disabled list |   |   | Before |
| 5/27/1966 | Cal | Egan,D | Traded away | LA |   | Before |
| 5/27/1966 | Cal | Reed | Acquired via trade | LA |   | Before |
| 5/27/1966 | ChA | Cater | Traded away | KC |   | Before |
| 5/27/1966 | ChA | Causey | Acquired via trade | KC |   | After |
| 5/27/1966 | KC | Cater | Acquired via trade | ChA |   | Before |
| 5/27/1966 | KC | Causey | Traded away | ChA |   | After |
| 5/27/1966 | LA | Reed | Traded away | Cal |   | Before |
| 5/27/1966 | SF | Perry | Placed on disabled list |   |   | Before |
| 5/28/1966 | Atl | Abernathy | Acquired via trade | ChN |   | Before |
| 5/28/1966 | Atl | Thomas | Traded away | ChN |   | Before |
| 5/28/1966 | ChN | Abernathy | Traded away | Atl |   | Before |
| 5/28/1966 | ChN | Thomas,L | Acquired via trade | Atl |   | Before |
| 5/28/1966 | LA | Covington | Signed |   |   | Before |
| 5/28/1966 | LA | Willhite | Promoted to active roster |   |   | Before |
| 5/28/1966 | Was | Duckworth | Placed on disabled list |   |   | Before |
| 5/29/1966 | Atl | Herrnstein | Acquired via trade | ChN |   | Before |
| 5/29/1966 | Atl | Keough | Traded away | ChN |   | Before |
| 5/29/1966 | Atl | Millan | Promoted to active roster |   |   | Before |
| 5/29/1966 | Cal | Rojas | Promoted to active roster |   |   | Before |
| 5/29/1966 | Cal | Sukla | Demoted to reserve roster |   |   | Before |
| 5/29/1966 | ChN | Estrada | Promoted to active roster |   |   | Before |
| 5/29/1966 | ChN | Herrnstein | Traded away | Atl |   | Before |
| 5/29/1966 | ChN | Keough | Acquired via trade | Atl |   | Before |
| 5/29/1966 | KC | Fazio | Promoted to active roster |   |   | Before |
| 5/29/1966 | Phi | Wagner | Promoted to active roster |   |   | Before |
| 5/29/1966 | Phi | Wise | Promoted to active roster |   |   | Before |
| 5/29/1966 | SF | Virgil | Promoted to active roster |   |   | Before |
| 6/1/1966 | Phi | Briggs | Placed on disabled list |   | 5/29/1966 | Before |
| 6/2/1966 | Atl | Alomar | Demoted to reserve roster |   |   | Before |
| 6/2/1966 | Atl | Niekro | Demoted to reserve roster |   |   | Before |
| 6/2/1966 | Atl | Schneider | Promoted to active roster |   |   | Before |
| 6/2/1966 | Bos | McMahon | Acquired via trade | Cle |   | Before |
| 6/2/1966 | Bos | Radatz | Traded away | Cle |   | Before |
| 6/2/1966 | Bos | Stange | Acquired via trade | Cle |   | Before |
| 6/2/1966 | Cle | Crandall | Placed on disabled list |   | 6/1/1966 | Before |
| 6/2/1966 | Cle | McMahon | Traded away | Bos |   | Before |
| 6/2/1966 | Cle | Radatz | Acquired via trade | Bos |   | Before |
| 6/2/1966 | Cle | Stange | Traded away | Bos |   | Before |
| 6/3/1966 | Cle | Booker | Promoted to active roster |   |   | Before |
| 6/3/1966 | Cle | Curry | Promoted to active roster |   |   | Before |
| 6/3/1966 | Was | Koplitz | Demoted to reserve roster |   |   | Before |
| 6/4/1966 | ChN | Thomas,F | Released |   |   | Before |
| 6/5/1966 | Hou | Bruce | Activated from disabled list |   |   | Before |
| 6/6/1966 | NYA | Ford | Placed on disabled list |   | 6/5/1966 | Before |
| 6/7/1966 | Hou | Heath | Promoted to active roster |   |   | Before |
| 6/7/1966 | Hou | Lee | Waived |   |   | Before |
| 6/10/1966 | Cal | Newman | Placed on disabled list |   | 6/7/1966 | Before |
| 6/10/1966 | Cal | Wright | Promoted to active roster |   |   | Before |
| 6/10/1966 | KC | Bryan | Traded away | NYA |   | Before |
| 6/10/1966 | KC | Repoz | Acquired via trade | NYA |   | Before |
| 6/10/1966 | KC | Stafford | Signed |   |   | Before |
| 6/10/1966 | KC | Talbot | Traded away | NYA |   | Before |
| 6/10/1966 | NYA | Bryan | Acquired via trade | KC |   | Before |
| 6/10/1966 | NYA | Repoz | Traded away | KC |   | Before |
| 6/10/1966 | NYA | Talbot | Acquired via trade | KC |   | Before |
| 6/10/1966 | NYN | Rusteck | Promoted to active roster |   |   | Before |
| 6/10/1966 | NYN | Shaw | Acquired via trade | SF |   | Before |
| 6/10/1966 | Phi | Craig | Activated from disabled list |   |   | Before |
| 6/10/1966 | SF | Shaw | Traded away | NYN |   | Before |
| 6/11/1966 | NYN | Arrigo | Placed on disabled list |   | 6/10/1966 | Before |
| 6/11/1966 | NYN | McGraw | Activated from disabled list |   |   | Before |
| 6/11/1966 | NYN | McGraw | Demoted to reserve roster |   |   | Before |
| 6/11/1966 | NYN | Richardson | Demoted to reserve roster |   |   | Before |
| 6/11/1966 | SF | Perry | Activated from disabled list |   |   | Before |
| 6/12/1966 | Hou | Gentile | Demoted to reserve roster |   |   | After |
| 6/12/1966 | Hou | Harrison | Promoted to active roster |   |   | After |
| 6/13/1966 | Bal | Adair | Traded away | ChA |   | Before |
| 6/13/1966 | Bal | Fisher | Acquired via trade | ChA |   | Before |
| 6/13/1966 | Bos | Gosger | Traded away | KC |   | Before |
| 6/13/1966 | Bos | Grilli | Traded away | KC |   | Before |
| 6/13/1966 | Bos | Sanders | Traded away | KC |   | Before |
| 6/13/1966 | Bos | Sheldon | Acquired via trade | KC |   | Before |
| 6/13/1966 | Bos | Tartabull | Acquired via trade | KC |   | Before |
| 6/13/1966 | Bos | Wyatt | Acquired via trade | KC |   | Before |
| 6/13/1966 | ChA | Adair | Acquired via trade | Bal |   | Before |
| 6/13/1966 | ChA | Fisher | Traded away | Bal |   | Before |
| 6/13/1966 | ChA | Wilhelm | Activated from disabled list |   |   | Before |
| 6/13/1966 | KC | Gosger | Acquired via trade | Bos |   | Before |
| 6/13/1966 | KC | Grilli | Acquired via trade | Bos |   | Before |
| 6/13/1966 | KC | Sanders | Acquired via trade | Bos |   | Before |
| 6/13/1966 | KC | Sheldon | Traded away | Bos |   | Before |
| 6/13/1966 | KC | Tartabull | Traded away | Bos |   | Before |
| 6/13/1966 | KC | Wyatt | Traded away | Bos |   | Before |
| 6/13/1966 | SF | Alou | Demoted to reserve roster |   |   | Before |
| 6/14/1966 | Bos | Christopher | Released |   |   | Before |
| 6/14/1966 | Bos | Demeter | Acquired via trade | Det |   | Before |
| 6/14/1966 | Bos | Wilson | Traded away | Det |   | Before |
| 6/14/1966 | ChN | Koonce | Promoted to active roster |   |   | Before |
| 6/14/1966 | Det | Demeter | Traded away | Bos |   | Before |
| 6/14/1966 | Det | Wilson | Acquired via trade | Bos |   | Before |
| 6/14/1966 | Phi | Belinsky | Demoted to reserve roster |   |   | Before |
| 6/14/1966 | Phi | Roebuck | Promoted to active roster |   |   | Before |
| 6/14/1966 | Phi | Wagner | Demoted to reserve roster |   |   | Before |
| 6/15/1966 | Atl | Fischer | Traded away | Cin |   | Before |
| 6/15/1966 | Atl | Jay | Acquired via trade | Cin |   | Before |
| 6/15/1966 | Atl | Schwall | Acquired via trade | Pit |   | Before |
| 6/15/1966 | Atl | O'Dell | Traded away | Pit |   | After |
| 6/15/1966 | ChN | Boccabella | Activated from disabled list |   |   | Before |
| 6/15/1966 | Cin | Fischer | Acquired via trade | Atl |   | Before |
| 6/15/1966 | Cin | Jay | Traded away | Atl |   | Before |
| 6/15/1966 | LA | Oliver | Activated from disabled list |   |   | Before |
| 6/15/1966 | LA | Willhite | Demoted to reserve roster |   |   | Before |
| 6/15/1966 | NYA | Friend | Traded away | NYN |   | Before |
| 6/15/1966 | NYN | Friend | Acquired via trade | NYA |   | Before |
| 6/15/1966 | NYN | Stuart | Released |   |   | Before |
| 6/15/1966 | Pit | Schwall | Traded away | Atl |   | Before |
| 6/15/1966 | Pit | O'Dell | Acquired via trade | Atl |   | After |
| 6/15/1966 | SF | Dietz | Promoted to active roster |   |   | Before |
| 6/15/1966 | Was | Chance | Demoted to reserve roster |   |   | Before |
| 6/15/1966 | Was | French | Demoted to reserve roster |   |   | Before |
| 6/16/1966 | Bal | Carreon | Demoted to reserve roster |   |   | Before |
| 6/16/1966 | Bal | Roznovsky | Promoted to active roster |   |   | Before |
| 6/16/1966 | ChN | Connors | Demoted to reserve roster |   |   | Before |
| 6/16/1966 | ChN | Lee | Claimed on waivers |   |   | Before |
| 6/16/1966 | ChN | Warwick | Demoted to reserve roster |   |   | Before |
| 6/16/1966 | Cle | Brown | Activated from disabled list |   |   | Before |
| 6/16/1966 | Cle | Martinez | Demoted to reserve roster |   |   | Before |
| 6/16/1966 | Was | Duckworth | Activated from disabled list |   |   | Before |
| 6/17/1966 | Bos | Stephenson | Demoted to reserve roster |   |   | Before |
| 6/17/1966 | Cin | Osteen | Promoted to active roster |   |   | Before |
| 6/17/1966 | Cin | Queen | Placed on disabled list |   |   | Before |
| 6/18/1966 | Det | Stanley | Activated from disabled list |   |   | Before |
| 6/19/1966 | Cle | Sims | Placed on disabled list |   |   | Before |
| 6/22/1966 | ChN | Simmons | Acquired via trade | StL |   | Before |
| 6/22/1966 | StL | Simmons | Traded away | ChN |   | Before |
| 6/23/1966 | KC | Duckworth | Acquired via trade | Was |   | Before |
| 6/23/1966 | KC | Harrelson | Traded away | Was |   | Before |
| 6/23/1966 | Min | Uhlaender | Promoted to active roster |   |   | Before |
| 6/23/1966 | Min | Valdespino | Demoted to reserve roster |   |   | Before |
| 6/23/1966 | Was | Duckworth | Traded away | KC |   | Before |
| 6/23/1966 | Was | Harrelson | Acquired via trade | KC |   | Before |
| 6/24/1966 | Cle | Crandall | Activated from disabled list |   |   | Before |
| 6/24/1966 | NYA | Ford | Activated from disabled list |   |   | Before |
| 6/24/1966 | StL | Jaster | Promoted to active roster |   |   | Before |
| 6/25/1966 | ChN | Campbell | Promoted to active roster |   |   | Before |
| 6/25/1966 | ChN | Estrada | Demoted to reserve roster |   |   | Before |
| 6/25/1966 | ChN | Krug | Demoted to reserve roster |   |   | Before |
| 6/26/1966 | ChN | Amalfitano | Demoted to reserve roster |   |   | After |
| 6/26/1966 | Hou | Morgan | Placed on disabled list |   | 6/24/1966 | Before |
| 6/27/1966 | Hou | Gotay | Promoted to active roster |   |   | Before |
| 6/27/1966 | Hou | Kroll | Demoted to reserve roster |   |   | Before |
| 6/27/1966 | SF | Alou | Promoted to active roster |   |   | Before |
| 6/27/1966 | SF | Brown | Demoted to reserve roster |   |   | Before |
| 6/29/1966 | NYN | Arrigo | Activated from disabled list |   |   | Before |
| 6/29/1966 | Was | Phillips | Promoted to active roster |   |   | Before |
| 7/1/1966 | Bal | Bertaina | Demoted to reserve roster |   |   | Before |
| 7/1/1966 | Bal | Short | Promoted to active roster |   |   | Before |
| 7/1/1966 | KC | Nash | Promoted to active roster |   |   | Before |
| 7/1/1966 | KC | Stock | Promoted to active roster |   |   | Before |
| 7/1/1966 | KC | Stone | Demoted to reserve roster |   |   | Before |
| 7/1/1966 | KC | Terry | Placed on disabled list |   |   | Before |
| 7/1/1966 | NYN | Sutherland | Promoted to active roster |   |   | Before |
| 7/4/1966 | Hou | Arlich | Promoted to active roster |   |   | Before |
| 7/4/1966 | Hou | Roberts | Released |   |   | Before |
| 7/5/1966 | ChN | Broglio | Demoted to reserve roster |   |   | Before |
| 7/5/1966 | LA | Barbieri | Promoted to active roster |   |   | Before |
| 7/5/1966 | LA | Stuart | Signed |   |   | Before |
| 7/5/1966 | NYN | Eilers | Demoted to reserve roster |   |   | Before |
| 7/5/1966 | NYN | Elliot | Promoted to active roster |   |   | Before |
| 7/5/1966 | NYN | Lewis | Demoted to reserve roster |   |   | Before |
| 7/5/1966 | NYN | Selma | Demoted to reserve roster |   |   | Before |
| 7/6/1966 | ChN | Faul | Demoted to reserve roster |   |   | Before |
| 7/7/1966 | KC | Dickson | Demoted to reserve roster |   |   | Before |
| 7/7/1966 | Min | Pascual | Placed on disabled list |   |   | Before |
| 7/7/1966 | SF | Bolin | Placed on disabled list |   | 7/6/1966 | Before |
| 7/8/1966 | Atl | Blasingame | Placed on disabled list |   |   | Before |
| 7/8/1966 | KC | Talton | Promoted to active roster |   |   | Before |
| 7/8/1966 | Min | Keller | Activated from disabled list |   |   | Before |
| 7/8/1966 | Min | Pleis | Promoted to active roster |   |   | Before |
| 7/8/1966 | Min | Roggenburk | Demoted to reserve roster |   |   | Before |
| 7/8/1966 | SF | Barton | Demoted to reserve roster |   |   | Before |
| 7/8/1966 | SF | Burda | Promoted to active roster |   |   | Before |
| 7/8/1966 | SF | Schroder | Promoted to active roster |   |   | Before |
| 7/9/1966 | LA | Griffith | Demoted to reserve roster |   |   | Before |
| 7/9/1966 | LA | Shirley | Demoted to reserve roster |   |   | Before |
| 7/9/1966 | Was | Camilli | Placed on disabled list |   |   | Before |
| 7/10/1966 | Hou | Gotay | Demoted to reserve roster |   |   | Before |
| 7/12/1966 | Pit | Rodgers | Placed on disabled list |   |   | Before |
| 7/13/1966 | ChN | Amalfitano | Promoted to active roster |   |   | Before |
| 7/13/1966 | ChN | Roberts | Signed |   |   | Before |
| 7/13/1966 | ChN | Stewart | Demoted to reserve roster |   |   | Before |
| 7/13/1966 | Pit | Michael | Promoted to active roster |   |   | Before |
| 7/14/1966 | Bos | Bennett | Activated from disabled list |   |   | Before |
| 7/14/1966 | Cal | Pearson | Activated from disabled list |   |   | Before |
| 7/15/1966 | Cin | Osteen | Demoted to reserve roster |   |   | Before |
| 7/15/1966 | Cin | Queen | Activated from disabled list |   |   | Before |
| 7/15/1966 | KC | Dobson | Placed on disabled list |   |   | Before |
| 7/16/1966 | NYN | Rusteck | Placed on disabled list |   |   | Before |
| 7/16/1966 | Was | Orsino | Activated from disabled list |   |   | Before |
| 7/17/1966 | ChN | Bryant | Promoted to active roster |   |   | Before |
| 7/18/1966 | Atl | Herrnstein | Demoted to reserve roster |   |   | Before |
| 7/18/1966 | Bos | Sadowski | Demoted to reserve roster |   |   | Before |
| 7/18/1966 | Cal | McGlothlin | Demoted to reserve roster |   |   | Before |
| 7/18/1966 | Phi | Wine | Placed on disabled list |   |   | Before |
| 7/19/1966 | Cle | Curry | Traded away | Hou |   | Before |
| 7/19/1966 | Cle | Gentile | Acquired via trade | Hou |   | Before |
| 7/19/1966 | Hou | Gentile | Traded away | Cle |   | Before |
| 7/19/1966 | Phi | Briggs | Activated from disabled list |   |   | Before |
| 7/19/1966 | Phi | Morris | Promoted to active roster |   |   | Before |
| 7/19/1966 | Phi | Verbanic | Promoted to active roster |   |   | Before |
| 7/19/1966 | StL | Mahaffey | Demoted to reserve roster |   |   | Before |
| 7/19/1966 | StL | Piche | Promoted to active roster |   |   | Before |
| 7/20/1966 | Atl | Kelley | Promoted to active roster |   |   | Before |
| 7/20/1966 | Cal | Newman | Activated from disabled list |   |   | Before |
| 7/20/1966 | Cal | Pearson | Released |   |   | After |
| 7/20/1966 | ChA | Freese | Traded away | Hou |   | Before |
| 7/20/1966 | Hou | Freese | Acquired via trade | ChA |   | Before |
| 7/20/1966 | KC | Dickson | Promoted to active roster |   |   | Before |
| 7/20/1966 | KC | Grzenda | Promoted to active roster |   |   | Before |
| 7/20/1966 | KC | Suarez | Demoted to reserve roster |   |   | Before |
| 7/21/1966 | SF | Brown | Promoted to active roster |   |   | Before |
| 7/21/1966 | SF | Landrum | Demoted to reserve roster |   |   | After |
| 7/21/1966 | SF | Schroder | Demoted to reserve roster |   |   | After |
| 7/22/1966 | Bal | Haney | Promoted to active roster |   |   | Before |
| 7/22/1966 | NYN | Green | Promoted to active roster |   |   | Before |
| 7/22/1966 | SF | Bolin | Activated from disabled list |   |   | Before |
| 7/22/1966 | Was | Bosman | Demoted to reserve roster |   |   | Before |
| 7/22/1966 | Was | Kreutzer | Promoted to active roster |   |   | Before |
| 7/22/1966 | Was | Moore | Promoted to active roster |   |   | Before |
| 7/23/1966 | Phi | Craig | Released |   |   | Before |
| 7/23/1966 | Phi | Roebuck | Released |   |   | Before |
| 7/25/1966 | Atl | Cline | Acquired via trade | ChN |   | Before |
| 7/25/1966 | Atl | Ritchie | Promoted to active roster |   |   | Before |
| 7/25/1966 | ChN | Cline | Traded away | Atl |   | Before |
| 7/25/1966 | Hou | Monteagudo | Demoted to reserve roster |   |   | Before |
| 7/25/1966 | Hou | Sembera | Promoted to active roster |   |   | Before |
| 7/25/1966 | KC | Terry | Activated from disabled list |   |   | Before |
| 7/25/1966 | Was | Orsino | Placed on disabled list |   |   | Before |
| 7/26/1966 | Bal | Bunker | Placed on disabled list |   | 7/25/1966 | Before |
| 7/26/1966 | Bos | Morehead | Placed on disabled list |   |   | Before |
| 7/26/1966 | KC | Hunter | Placed on disabled list |   |   | Before |
| 7/27/1966 | Atl | Olivo | Demoted to reserve roster |   |   | Before |
| 7/27/1966 | Atl | Umbach | Demoted to reserve roster |   |   | Before |
| 7/28/1966 | Atl | Millan | Demoted to reserve roster |   |   | Before |
| 7/30/1966 | Atl | Blasingame | Activated from disabled list |   |   | Before |
| 7/30/1966 | Atl | Blasingame | Demoted to reserve roster |   |   | Before |
| 7/30/1966 | Atl | Jarvis | Promoted to active roster |   |   | Before |
| 7/30/1966 | Atl | Niekro | Promoted to active roster |   |   | Before |
| 7/30/1966 | Cal | Johnstone | Promoted to active roster |   |   | Before |
| 7/30/1966 | Cal | Warner | Demoted to reserve roster |   |   | Before |
| 7/30/1966 | ChA | Hicks | Promoted to active roster |   |   | Before |
| 7/30/1966 | ChA | Martin | Placed on disabled list |   |   | Before |
| 7/30/1966 | ChN | Earley | Promoted to active roster |   |   | Before |
| 7/30/1966 | Hou | Dierker | Placed on disabled list |   |   | Before |
| 7/30/1966 | Hou | Zachary | Promoted to active roster |   |   | Before |
| 7/30/1966 | KC | Blanco | Promoted to active roster |   |   | Before |
| 7/30/1966 | KC | Dickson | Demoted to reserve roster |   |   | Before |
| 7/30/1966 | KC | Duckworth | Demoted to reserve roster |   |   | Before |
| 7/30/1966 | KC | Odom | Promoted to active roster |   |   | Before |
| 7/30/1966 | KC | Stafford | Demoted to reserve roster |   |   | Before |
| 7/30/1966 | StL | Carlton | Promoted to active roster |   |   | Before |
| 7/30/1966 | StL | Stallard | Demoted to reserve roster |   |   | Before |
| 7/30/1966 | Was | Segui | Traded away | KC |   | Before |
| 7/31/1966 | Pit | Purkey | Released |   |   | Before |
| 7/31/1966 | Pit | Rodgers | Activated from disabled list |   |   | Before |
| 8/1/1966 | Cle | Sims | Activated from disabled list |   |   | Before |
| 8/2/1966 | ChN | Hoeft | Released |   |   | Before |
| 8/2/1966 | KC | Blasingame | Acquired via trade | Was |   | Before |
| 8/2/1966 | Was | Blasingame | Traded away | KC |   | Before |
| 8/2/1966 | Was | Cullen | Promoted to active roster |   |   | Before |
| 8/2/1966 | Was | French | Promoted to active roster |   |   | Before |
| 8/4/1966 | Cal | Coates | Promoted to active roster |   |   | Before |
| 8/4/1966 | Cal | Reed | Demoted to reserve roster |   |   | Before |
| 8/5/1966 | Atl | Bales | Promoted to active roster |   |   | Before |
| 8/5/1966 | Atl | Schneider | Demoted to reserve roster |   |   | Before |
| 8/5/1966 | Hou | Morgan | Activated from disabled list |   |   | Before |
| 8/5/1966 | Hou | Wynn | Placed on disabled list |   |   | Before |
| 8/6/1966 | Hou | Arlich | Demoted to reserve roster |   |   | Before |
| 8/6/1966 | Hou | Davis,R | Promoted to active roster |   |   | Before |
| 8/6/1966 | KC | Terry | Traded away | NYN |   | Before |
| 8/6/1966 | NYN | Green | Demoted to reserve roster |   |   | Before |
| 8/6/1966 | NYN | Terry | Acquired via trade | KC |   | Before |
| 8/7/1966 | NYN | Bearnarth | Demoted to reserve roster |   |   | After |
| 8/8/1966 | NYN | Hickman | Activated from disabled list |   |   | Before |
| 8/9/1966 | Cal | Reichardt | Placed on disabled list |   |   | Before |
| 8/9/1966 | KC | Handrahan | Promoted to active roster |   |   | Before |
| 8/11/1966 | Cle | Booker | Demoted to reserve roster |   |   | Before |
| 8/11/1966 | Cle | Sims | Demoted to reserve roster |   |   | Before |
| 8/12/1966 | Cal | Lopez,R | Promoted to active roster |   |   | Before |
| 8/12/1966 | NYN | Arrigo | Demoted to reserve roster |   |   | Before |
| 8/12/1966 | NYN | Harrelson | Promoted to active roster |   |   | Before |
| 8/12/1966 | NYN | McGraw | Promoted to active roster |   |   | Before |
| 8/12/1966 | NYN | McMillan | Placed on disabled list |   |   | Before |
| 8/12/1966 | NYN | Sutherland | Demoted to reserve roster |   |   | Before |
| 8/12/1966 | StL | Savage | Promoted to active roster |   |   | Before |
| 8/13/1966 | Bos | Morehead | Activated from disabled list |   |   | Before |
| 8/13/1966 | Cle | Sims | Promoted to active roster |   |   | Before |
| 8/13/1966 | Min | Pascual | Activated from disabled list |   |   | Before |
| 8/13/1966 | StL | Spiezio | Promoted to active roster |   |   | Before |
| 8/13/1966 | StL | Tolan | Demoted to reserve roster |   |   | Before |
| 8/14/1966 | Bos | Petrocelli | Placed on disabled list |   | 8/13/1966 | Before |
| 8/15/1966 | Bal | Bunker | Activated from disabled list |   |   | Before |
| 8/15/1966 | Bal | Short | Traded away | Bos |   | Before |
| 8/15/1966 | Bos | Fischer | Acquired via trade | Cin |   | Before |
| 8/15/1966 | Bos | Morehead | Demoted to reserve roster |   |   | Before |
| 8/15/1966 | Bos | Short | Acquired via trade | Bal |   | Before |
| 8/15/1966 | Cin | Fischer | Traded away | Bos |   | Before |
| 8/15/1966 | Cin | Osteen | Promoted to active roster |   |   | Before |
| 8/15/1966 | KC | Fazio | Demoted to reserve roster |   |   | Before |
| 8/15/1966 | Was | Orsino | Activated from disabled list |   |   | Before |
| 8/15/1966 | Was | Orsino | Demoted to reserve roster |   |   | Before |
| 8/16/1966 | Det | McFarlane | Placed on disabled list |   |   | Before |
| 8/16/1966 | Hou | Colbert | Placed on disabled list |   | 8/15/1966 | Before |
| 8/16/1966 | Hou | Dierker | Activated from disabled list |   |   | Before |
| 8/16/1966 | NYN | Rusteck | Activated from disabled list |   |   | Before |
| 8/17/1966 | Hou | Carpin | Promoted to active roster |   |   | Before |
| 8/17/1966 | Hou | Owens | Demoted to reserve roster |   |   | Before |
| 8/19/1966 | NYN | Rusteck | Demoted to reserve roster |   |   | Before |
| 8/19/1966 | NYN | Selma | Promoted to active roster |   |   | Before |
| 8/21/1966 | NYA | Ford | Placed on disabled list |   |   | Before |
| 8/22/1966 | ChN | Church | Promoted to active roster |   |   | Before |
| 8/22/1966 | ChN | Lee | Placed on disabled list |   |   | Before |
| 8/22/1966 | Min | Keller | Demoted to reserve roster |   |   | Before |
| 8/22/1966 | NYA | Whitaker | Promoted to active roster |   |   | Before |
| 8/25/1966 | KC | Donaldson | Promoted to active roster |   |   | Before |
| 8/26/1966 | Bal | Bertaina | Promoted to active roster |   |   | Before |
| 8/29/1966 | NYA | Amaro | Activated from disabled list |   |   | Before |
| 8/30/1966 | Cal | Egan,T | Promoted to active roster |   |   | Before |
| 8/30/1966 | Min | Ollom | Promoted to active roster |   |   | Before |
| 8/30/1966 | Min | Clark | Promoted to active roster |   |   | After |
| 8/30/1966 | Min | Roland | Promoted to active roster |   |   | After |
| 8/30/1966 | Min | Valdespino | Promoted to active roster |   |   | After |
| 8/31/1966 | KC | Hunter | Activated from disabled list |   |   | Before |
| 9/1/1966 | Bal | Lau | Activated from disabled list |   |   | Before |
| 9/1/1966 | Bos | Petrocelli | Activated from disabled list |   |   | Before |
| 9/1/1966 | ChA | Martin | Activated from disabled list |   |   | Before |
| 9/1/1966 | Cle | Heffner | Promoted to active roster |   |   | Before |
| 9/1/1966 | Hou | Colbert | Activated from disabled list |   |   | Before |
| 9/1/1966 | NYN | Fitzmaurice | Promoted to active roster |   |   | Before |
| 9/1/1966 | NYN | McMillan | Activated from disabled list |   |   | Before |
| 9/1/1966 | NYN | Miller | Promoted to active roster |   |   | Before |
| 9/1/1966 | Phi | Wine | Activated from disabled list |   |   | Before |
| 9/1/1966 | SF | Barton | Promoted to active roster |   |   | Before |
| 9/1/1966 | SF | Hoeft | Signed |   |   | Before |
| 9/2/1966 | Atl | Blasingame | Promoted to active roster |   |   | Before |
| 9/2/1966 | Atl | Vaughan | Promoted to active roster |   |   | Before |
| 9/2/1966 | Det | McFarlane | Activated from disabled list |   |   | Before |
| 9/2/1966 | Hou | Miller | Promoted to active roster |   |   | Before |
| 9/2/1966 | Hou | Ray | Promoted to active roster |   |   | Before |
| 9/3/1966 | KC | Bando | Promoted to active roster |   |   | Before |
| 9/3/1966 | KC | Edgerton | Promoted to active roster |   |   | Before |
| 9/3/1966 | KC | Lachemann | Promoted to active roster |   |   | Before |
| 9/3/1966 | KC | Monday | Promoted to active roster |   |   | Before |
| 9/3/1966 | KC | Schwartz | Promoted to active roster |   |   | Before |
| 9/3/1966 | NYA | Ford | Activated from disabled list |   |   | Before |
| 9/4/1966 | ChA | Jones | Promoted to active roster |   |   | Before |
| 9/4/1966 | Was | Camilli | Activated from disabled list |   |   | Before |
| 9/5/1966 | Cal | McGlothlin | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cal | Rubio | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cal | Sukla | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Bollo | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Bradford | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Josephson | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Kenworthy | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Klages | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Staehle | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Stroud | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChA | Voss | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Connors | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Dowling | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Faul | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Hartenstein | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Krug | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Norman | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Nye | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Popovich | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Raudman | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Stewart | Promoted to active roster |   |   | Before |
| 9/5/1966 | ChN | Warwick | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cin | May | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cin | Zanni | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cle | Booker | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cle | Culver | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cle | Davis | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cle | Dicken | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cle | Fuller | Promoted to active roster |   |   | Before |
| 9/5/1966 | Cle | Vidal | Promoted to active roster |   |   | Before |
| 9/5/1966 | Det | Brunsberg | Promoted to active roster |   |   | Before |
| 9/5/1966 | Det | Graham | Promoted to active roster |   |   | Before |
| 9/5/1966 | Det | Korince | Promoted to active roster |   |   | Before |
| 9/5/1966 | Det | Pepper | Promoted to active roster |   |   | Before |
| 9/5/1966 | Hou | Davis,B | Promoted to active roster |   |   | Before |
| 9/5/1966 | Hou | Gaines | Promoted to active roster |   |   | Before |
| 9/5/1966 | Hou | Pointer | Promoted to active roster |   |   | Before |
| 9/5/1966 | LA | Hutton | Promoted to active roster |   |   | Before |
| 9/5/1966 | LA | Singer | Promoted to active roster |   |   | Before |
| 9/5/1966 | Min | Mitterwald | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYA | Bahnsen | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYA | Cullen | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYA | Ferraro | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYA | Hegan | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYA | Henry | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYA | Miller | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYA | Murcer | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYN | Bearnarth | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYN | Goossen | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYN | Lewis | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYN | Napoleon | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYN | Rusteck | Promoted to active roster |   |   | Before |
| 9/5/1966 | NYN | Sutherland | Promoted to active roster |   |   | Before |
| 9/5/1966 | Phi | Jackson,G | Promoted to active roster |   |   | Before |
| 9/5/1966 | Phi | Wagner | Promoted to active roster |   |   | Before |
| 9/5/1966 | Pit | Roberts | Promoted to active roster |   |   | Before |
| 9/5/1966 | Pit | Shellenback | Promoted to active roster |   |   | Before |
| 9/5/1966 | Pit | Spriggs | Promoted to active roster |   |   | Before |
| 9/5/1966 | Pit | Walker | Promoted to active roster |   |   | Before |
| 9/5/1966 | SF | Garibaldi | Promoted to active roster |   |   | Before |
| 9/5/1966 | SF | Henderson | Promoted to active roster |   |   | Before |
| 9/5/1966 | SF | Hiatt | Promoted to active roster |   |   | Before |
| 9/5/1966 | SF | Johnson | Promoted to active roster |   |   | Before |
| 9/5/1966 | SF | Robertson | Promoted to active roster |   |   | Before |
| 9/5/1966 | SF | Schroder | Promoted to active roster |   |   | Before |
| 9/5/1966 | StL | Hughes | Promoted to active roster |   |   | Before |
| 9/5/1966 | Was | Baldwin | Promoted to active roster |   |   | Before |
| 9/6/1966 | Was | Brumley | Promoted to active roster |   |   | Before |
| 9/7/1966 | Bos | Roggenburk | Acquired via trade | Min |   | Before |
| 9/7/1966 | KC | Blasingame | Released |   |   | Before |
| 9/7/1966 | KC | Fazio | Promoted to active roster |   |   | Before |
| 9/7/1966 | KC | Suarez | Promoted to active roster |   |   | Before |
| 9/7/1966 | Min | Roggenburk | Traded away | Bos |   | Before |
| 9/8/1966 | Hou | Watson | Promoted to active roster |   |   | Before |
| 9/9/1966 | Was | Allen | Promoted to active roster |   |   | Before |
| 9/10/1966 | LA | Schofield | Acquired via trade | NYA |   | Before |
| 9/10/1966 | NYA | Schofield | Traded away | LA |   | Before |
| 9/10/1966 | NYN | Ryan | Promoted to active roster |   |   | Before |
| 9/11/1966 | Bal | Barnowski | Promoted to active roster |   |   | Before |
| 9/11/1966 | Bal | Belanger | Promoted to active roster |   |   | Before |
| 9/11/1966 | Bal | Carreon | Promoted to active roster |   |   | Before |
| 9/11/1966 | Bal | Epstein | Promoted to active roster |   |   | Before |
| 9/11/1966 | Bal | Phoebus | Promoted to active roster |   |   | Before |
| 9/12/1966 | Bos | Andrews | Promoted to active roster |   |   | Before |
| 9/12/1966 | Bos | Morehead | Promoted to active roster |   |   | Before |
| 9/12/1966 | Bos | Smith,R | Promoted to active roster |   |   | Before |
| 9/12/1966 | Hou | Coombs | Promoted to active roster |   |   | Before |
| 9/12/1966 | KC | Stafford | Promoted to active roster |   |   | Before |
| 9/12/1966 | LA | Willhite | Promoted to active roster |   |   | Before |
| 9/12/1966 | Pit | Roberts | Traded away | Bal |   | Before |
| 9/12/1966 | StL | Aust | Promoted to active roster |   |   | Before |
| 9/12/1966 | StL | Cosman | Promoted to active roster |   |   | Before |
| 9/12/1966 | StL | Johnson | Promoted to active roster |   |   | Before |
| 9/12/1966 | StL | Kernek | Promoted to active roster |   |   | Before |
| 9/12/1966 | StL | Mahaffey | Promoted to active roster |   |   | Before |
| 9/12/1966 | StL | Stallard | Promoted to active roster |   |   | Before |
| 9/12/1966 | StL | Tolan | Promoted to active roster |   |   | Before |
| 9/12/1966 | Was | Bosman | Promoted to active roster |   |   | Before |
| 9/12/1966 | Was | Chance | Promoted to active roster |   |   | Before |
| 9/12/1966 | Was | Coleman | Promoted to active roster |   |   | Before |
| 9/12/1966 | Was | Craig | Promoted to active roster |   |   | Before |
| 9/14/1966 | Cal | Kelso | Promoted to active roster |   |   | Before |
| 9/14/1966 | Cal | Morton | Promoted to active roster |   |   | Before |
| 9/14/1966 | Cal | Spangler | Promoted to active roster |   |   | Before |
| 9/14/1966 | Cal | Vinson | Promoted to active roster |   |   | Before |
| 9/14/1966 | Cal | Warner | Promoted to active roster |   |   | Before |
| 9/16/1966 | KC | Dobson | Activated from disabled list |   |   | Before |
| 9/16/1966 | LA | Campanis | Promoted to active roster |   |   | Before |
| 9/16/1966 | LA | Crawford | Promoted to active roster |   |   | Before |
| 9/16/1966 | LA | Griffith | Promoted to active roster |   |   | Before |
| 9/16/1966 | Phi | Schaffer | Promoted to active roster |   |   | Before |
| 9/16/1966 | Phi | Sutherland | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Alomar | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Garrett | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Kopacz | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Millan | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Olivo | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Robinson | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Schneider | Promoted to active roster |   |   | Before |
| 9/17/1966 | Atl | Upshaw | Promoted to active roster |   |   | Before |
| 9/17/1966 | Min | Reese | Promoted to active roster |   |   | Before |
| 9/17/1966 | StL | Willis | Promoted to active roster |   |   | Before |
| 9/18/1966 | Pit | Bosch | Promoted to active roster |   |   | Before |
| 9/19/1966 | Hou | Adlesh | Promoted to active roster |   |   | Before |
| 9/19/1966 | Hou | Kroll | Promoted to active roster |   |   | Before |
| 9/19/1966 | Hou | Sims | Promoted to active roster |   |   | Before |
| 9/19/1966 | Hou | Wilson | Promoted to active roster |   |   | Before |
| 9/19/1966 | KC | Dickson | Promoted to active roster |   |   | Before |
| 9/19/1966 | Was | Narum | Promoted to active roster |   |   | Before |
| 9/19/1966 | Was | Orsino | Promoted to active roster |   |   | Before |
| 9/20/1966 | Atl | Reed | Promoted to active roster |   |   | Before |
| 9/28/1966 | Atl | Sadowski | Promoted to active roster |   |   | Before |
| 9/29/1966 | Cal | Reichardt | Activated from disabled list |   |   | Before |
| 10/7/1966 | Min | Clark | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | Min | Mitterwald | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | Min | Ollom | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | Min | Pleis | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | Min | Reese | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | Min | Roland | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Dietz | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Garibaldi | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Henderson | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Hiatt | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Hoeft | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Johnson | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Mason | Demoted to reserve roster |   |   | Before |
| 10/7/1966 | SF | Robertson | Demoted to reserve roster |   |   | Before |