| Thursday, April 9th, 1981 |
| Promoted C Arnie Wilson to Triple A Millet. |
| Promoted 1B Felipe Flores to Double A Tulsa. |
| Promoted 1B Rich Schmidt to Double A Tulsa. |
| Promoted 2B Jim Richard to Double A Tulsa. |
| Promoted 3B Adrián Campos to Double A Tulsa. |
| Received MR Peter Adkins from Double A Tulsa. |
| Received MR Baio Ow from Double A Tulsa. |
| Signed free agent 3B Juan Jose Cruz to a minor league contract. |
| Signed free agent 1B Tim Ross to a minor league contract. |
| Signed free agent 1B Daniel Maldonado to a minor league contract. |
| Signed free agent LF Jesús García to a minor league contract. |
| Signed free agent RF Scott Parker to a minor league contract. |
| Signed free agent RF Jorge Águila to a minor league contract. |
| Signed free agent 1B Pedro Mesa to a minor league contract. |
| Signed free agent 3B Bill Range to a minor league contract. |
| Signed free agent CF Kyle Jones to a minor league contract. |
| Signed free agent CF Paul Roberts to a minor league contract. |
| Signed free agent MR Álex Coronado to a minor league contract. |
| Signed free agent MR Danny Kennedy to a minor league contract. |
| Promoted MR Álex Coronado to Double A Tulsa. |
| Promoted 3B Bill Range to Double A Tulsa. |
| Promoted 1B Tim Ross to Double A Tulsa. |
| Promoted CF Paul Roberts to Double A Tulsa. |
| Promoted RF Scott Parker to Double A Tulsa. |
| Promoted CF Kyle Jones to Double A Tulsa. |
| Promoted LF Jesús García to Double A Tulsa. |
| Promoted 1B Pedro Mesa to Double A Tulsa. |
| Promoted 3B Juan Jose Cruz to Double A Tulsa. |
| Received SP Víctor Santos from Double A Tulsa. |
| Received SS José Ramírez from Double A Tulsa. |
| Received 2B Jim Richard from Double A Tulsa. |
| Received LF Dave Hudson from Double A Tulsa. |
| Received RF Marvin Metcalf from Double A Tulsa. |
| Received 3B Pat Walker from Double A Tulsa. |
| Received 3B Adrián Campos from Double A Tulsa. |
| Received MR Eduardo Costa from Double A Tulsa. |
| Received MR Johnny Marshall from Double A Tulsa. |
