| Thursday, April 9th, 1981 |
| Promoted SP Dave Crane from Double A Victoria to Triple A Kitchener. |
| Demoted MR Leonard Erickson to Triple A Kitchener. |
| Promoted MR Manny Baltiérrez from Double A Victoria to Triple A Kitchener. |
| Demoted C Marcus Marples to Triple A Kitchener. |
| Demoted SS Manuel Martínez to Triple A Kitchener. |
| Demoted SS Jessie Holloway to Triple A Kitchener. |
| Demoted 3B Ben Ryan to Triple A Kitchener. |
| Demoted 1B Carlos Romero to Triple A Kitchener. |
| Demoted LF Manny De La Cruz to Triple A Kitchener. |
| Demoted RF Carlos Lucero to Triple A Kitchener. |
| Demoted LF Arturo López to Triple A Kitchener. |
| Demoted 1B Tom Galmer to Triple A Kitchener. |
| Demoted 1B Kelly Watkins to Triple A Kitchener. |
| Demoted RF Kian Mountford to Triple A Kitchener. |
| Promoted SP Phil Wilson from Single A Fullerton to Double A Victoria. |
| Promoted SP Max Clark from Single A Fullerton to Double A Victoria. |
| Promoted MR Ralph Phelps from Single A Fullerton to Double A Victoria. |
| Promoted CL Derrek Stevens from Single A Fullerton to Double A Victoria. |
| Promoted C Guus Buyse from Single A Fullerton to Double A Victoria. |
| Demoted 3B Pancho Saucedo to Double A Victoria. |
| Demoted 3B Tim Daniels from Triple A Kitchener to Double A Victoria. |
| Demoted 2B Dan Townsend from Triple A Kitchener to Double A Victoria. |
| Demoted RF Ramón Morales from Triple A Kitchener to Double A Victoria. |
| Demoted RF Luis Villarreal from Triple A Kitchener to Double A Victoria. |
| Demoted 1B Manuel Villodas from Triple A Kitchener to Double A Victoria. |
| Demoted 1B José Bueno from Triple A Kitchener to Double A Victoria. |
| Demoted 1B Hubert Johnson from Double A Victoria to Single A Fullerton. |
| Signed free agent MR Bernardo García to a minor league contract. |
| Signed free agent MR David Reyes to a minor league contract. |
| Signed free agent MR Gerald Jackson to a minor league contract. |
| Signed free agent CL Cris Gómez to a minor league contract. |
| Signed free agent MR Earnest Bryant to a minor league contract. |
| Signed free agent CL Steve Davis to a minor league contract. |
| Signed free agent C José Tirado to a minor league contract. |
| Signed free agent C Bob Hall to a minor league contract. |
| Signed free agent LF Freddy Dillow to a minor league contract. |
| Signed free agent 1B John Dickson to a minor league contract. |
| Signed free agent SS Jacob Baker to a minor league contract. |
| Signed free agent LF Jason Fitzsimmons to a minor league contract. |
| Signed free agent RF Rafael Martínez to a minor league contract. |
| Signed free agent MR Pedro Vázquez to a minor league contract. |
| Signed free agent MR Nick Hudson to a minor league contract. |
| Signed free agent MR Jesús Gómez to a minor league contract. |
| Promoted MR Juan García from Double A Victoria to Triple A Kitchener. |
| Promoted LF Jason Fitzsimmons from Single A Fullerton to Triple A Kitchener. |
| Promoted 1B Manuel Villodas from Double A Victoria to Triple A Kitchener. |
| Promoted RF Ramón Morales from Double A Victoria to Triple A Kitchener. |
| Promoted MR Gerald Jackson from Single A Fullerton to Double A Victoria. |
| Demoted MR Zong-yuan Xiao from Triple A Kitchener to Double A Victoria. |
| Promoted C José Tirado from Single A Fullerton to Double A Victoria. |
| Promoted C Bob Hall from Single A Fullerton to Double A Victoria. |
| Demoted 1B Carlos Romero from Triple A Kitchener to Double A Victoria. |
| Demoted RF Kian Mountford from Triple A Kitchener to Double A Victoria. |
| Demoted RF Carlos Lucero from Triple A Kitchener to Double A Victoria. |
| Demoted SP Kevin Russell from Double A Victoria to Single A Fullerton. |
| Demoted C Guus Buyse from Double A Victoria to Single A Fullerton. |
| Demoted CF Bryce Aguirre from Double A Victoria to Single A Fullerton. |
| Demoted SS Orlando Rivera from Double A Victoria to Single A Fullerton. |
