| MAY | |
| DATE | TRANSACTION |
| May 20, 2012 | Placed OF Emilio Bonifacio on the 15-day DL. Recalled OF Chris Coghlan from Las Vegas. Selected the contract of INF Donovan Solano from Las Vegas. |
| May 19, 2012 | Optioned 1B Gaby Sanchez to New Orleans (PCL). |
| May 6, 2012 | Optioned OF Bryan Petersen and LHP Dan Jennings to New Orleans (PCL). Recalled RHP Chris Hatcher and RHP Sandy Rosario from New Orleans. |
| APRIL | |
| DATE | TRANSACTION |
| April 10, 2012 | Suspended manager Ozzie Guillen for five games because of his comments about Fidel Castro. |
| April 5, 2012 | Placed RHP Jose Ceda on the 15-day DL. Selected the contract of RHP Chad Gaudin from New Orleans (PCL). Placed RHP Jose Ceda on 15-day DL, retroactive to March 26. Reassigned RHP Rob Delaney, RHP Gary Glover, C Clint Sammons and INF Donovan Solano to their minor league camp. |
| April 2, 2012 | Selected the contract of OF Austin Kearns from New Orleans (PCL). Optioned LHP Wade LeBlanc and RHP Bryan Peterson to New Orleans. |
| MARCH | |
| DATE | TRANSACTION |
| March 23, 2012 | Reassigned OF Scott Cousins to their minor league camp. |
| JANUARY | |
| DATE | TRANSACTION |
| January 17, 2012 | Agreed to terms with RHP Juan Carlos Oviedo and RHP Edward Mujica on one-year contracts. |
| January 12, 2012 | Agreed to terms with 1B Greg Dobbs on a two-year contract. |
| January 5, 2012 | Designated RHP Elih Villanueva for assignment. |