| Date | |
|---|---|
| 09/18/12 | Sanchez, Yunesky placed on inactive list |
| 09/16/12 | Cassel, Justin activated |
| 09/12/12 | Bynum, Freddie placed on inactive list |
| 09/12/12 | Hennigan, Dan reinstated to active list |
| 09/11/12 | Cassel, Justin placed on inactive list |
| 09/09/12 | Kiniry, Rian placed on inactive list |
| 09/09/12 | Champion, Adam activated |
| 08/30/12 | Anderson, Brian activated |
| 08/25/12 | Hennigan, Dan placed on disabled list (minimum 7 days) |
| 08/25/12 | Green, Sean placed on inactive list Retired |
| 08/13/12 | Arguello, Doug activated |
| 08/10/12 | Curtis, Colin activated |
| 08/10/12 | Ramsey, Keith activated |
| 08/07/12 | Hose, T.J. suspended |
| 08/06/12 | Sinclair, Taylor released |
| 08/04/12 | Fox, Jake sold to Philadelphia Phillies |
| 07/30/12 | Arguello, Doug sold to Taiwan- Brother Elephants |
| 07/30/12 | Drennen, Johnny reinstated to active list |
| 07/23/12 | Sinclair, Taylor activated |
| 07/23/12 | Sisco, Andy activated |
| 07/23/12 | Drennen, Johnny placed on disabled list (minimum 7 days) |
| 07/20/12 | Mathews, Aaron placed on inactive list |
| 07/20/12 | Braboy, Brandon activated |
| 07/19/12 | Drennen, Johnny reinstated to active list |
| 07/15/12 | Kibler, Jon activated |
| 07/15/12 | Stoner, Tobi placed on inactive list |
| 07/15/12 | Solbach, Mike sold to Colorado Rockies (AA) |
| 07/13/12 | Santangelo, Lou released |
| 07/13/12 | Fox, Jake activated |
| 07/04/12 | MacDonald, Mike sold to Boston Red Sox (AA) |
| 07/03/12 | Stoner, Tobi activated |
| 07/03/12 | Green, Sean activated |
| 07/02/12 | Kiniry, Rian acquired in trade from York Revolution |
| 06/30/12 | Phillips, Paul sold to Lamingo Monkeys- Taiwan |
| 06/29/12 | Drennen, Johnny placed on disabled list (minimum 7 days) |
| 06/25/12 | Sandoval, Freddy suspended |
| 06/25/12 | Hennigan, Dan signed |
| 06/14/12 | Santangelo, Lou reinstated to active list |
| 06/12/12 | Bowyer, Travis placed on disabled list (minimum 7 days) |
| 06/12/12 | Rundgren, Rex placed on inactive list |
| 06/09/12 | Sanchez, Yunesky activated |
| 06/08/12 | Quinowski, David released |
| 06/06/12 | Dobies, Andrew activated |
| 06/05/12 | Claggett, Anthony released |
| 06/04/12 | Santangelo, Lou placed on disabled list (minimum 7 days) |
| 06/03/12 | Rundgren, Rex placed on disabled list (minimum 7 days) |
| 06/03/12 | Drennen, Johnny reinstated to active list |
| 05/28/12 | Quinowski, David placed on inactive list |
| 05/25/12 | Drennen, Johnny placed on disabled list (minimum 7 days) |
| 05/24/12 | Mack, DeAngelo traded to outside league |