| Date | |
|---|---|
| 09/04/13 | Claggett, Anthony acquired in trade from outside league (St. Paul, American Assoc.) |
| 08/28/13 | Lewis, Rommie sold to Lamigo Monkeys (Taiwan) |
| 08/19/13 | Rincon, Juan placed on inactive list |
| 08/19/13 | Savage, Will acquired in trade from Lancaster Barnstormers |
| 08/11/13 | Tomko, Brett placed on inactive list |
| 08/09/13 | Vaughan, Beau signed |
| 08/08/13 | Green, Nick sold to EDA Rhinos (Taiwan) |
| 08/04/13 | Castro, Ofilio activated |
| 08/04/13 | Marte, Andy sold to Los Angeles Angels of Anaheim |
| 08/01/13 | Paredes, Edward activated |
| 08/01/13 | Torres, Joe released |
| 07/29/13 | Neil, Charlie signed |
| 07/29/13 | Teufel, Shawn placed on inactive list (retired) |
| 07/28/13 | Green, Nick activated |
| 07/28/13 | Castro, Ofilio placed on inactive list |
| 07/26/13 | Segovia, Zack signed |
| 07/25/13 | Johnson, Cody released |
| 07/25/13 | Zagone, Rick released |
| 07/25/13 | Castro, Ofilio signed |
| 07/23/13 | Zagone, Rick activated |
| 07/23/13 | Green, Nick placed on inactive list |
| 07/22/13 | Hernandez, Michael signed |
| 07/22/13 | Paredes, Edward placed on inactive list |
| 07/20/13 | Zagone, Rick placed on inactive list |
| 07/20/13 | Tomko, Brett activated |
| 07/18/13 | Regas, Kris released |
| 07/16/13 | Zagone, Rick activated |
| 07/16/13 | Tomko, Brett placed on inactive list |
| 07/12/13 | Tracy, Chad signed |
| 07/12/13 | Spencer, Matt signed |
| 07/12/13 | Kirkland, Kody signed |
| 07/12/13 | Slama, Anthony activated |
| 07/12/13 | Patterson, Eric sold to Milwaukee Brewers |
| 07/12/13 | Zagone, Rick placed on inactive list |
| 07/07/13 | Mayorson, Manny released |
| 07/07/13 | Shanks, James released |
| 07/06/13 | Slama, Anthony signed |
| 07/05/13 | Shanks, James activated |
| 07/05/13 | DeLeon, Sandy placed on inactive list |
| 07/02/13 | Teufel, Shawn activated |
| 07/02/13 | Majewski, Val placed on inactive list |
| 06/30/13 | DeLeon, Sandy activated |
| 06/30/13 | Teufel, Shawn placed on inactive list |
| 06/28/13 | Majewski, Val signed |
| 06/28/13 | Shanks, James placed on inactive list |
| 06/20/13 | Green, Nick activated |
| 06/20/13 | Regas, Kris placed on inactive list |
| 06/18/13 | Teahen, Mark signed |
| 06/18/13 | Fiorentino, Jeff placed on inactive list |
| 06/07/13 | Tomko, Brett activated |
| 06/07/13 | Green, Nick sold to Yucatan (Mexico) |
| 06/05/13 | Shanks, James activated |
| 06/05/13 | Burgamy, Brian sold to Campeche (Mexico) |
| 06/01/13 | Zagone, Rick signed |
| 06/01/13 | Tomko, Brett placed on inactive list |
| 06/01/13 | Shanks, James placed on inactive list |
| 06/01/13 | McPherson, Dallas placed on inactive list |
| 05/29/13 | McPherson, Dallas signed |
| 05/27/13 | Coles, Mike released |
| 05/25/13 | Mayorson, Manny signed |
| 05/23/13 | Graham, Tyler released |
| 05/20/13 | Johnson, Cody signed |
| 05/18/13 | Coles, Mike signed |
| 05/17/13 | Paredes, Edward signed |
| 05/14/13 | Fox, Matt sold to New York Mets |
| 05/13/13 | Gonzalez, Andy placed on inactive list |
| 05/13/13 | Repko, Jason placed on inactive list |
| 05/11/13 | Shanks, James signed |
| 05/08/13 | Pease, Dustin placed on inactive list |
| 05/08/13 | Yan, Ruddy signed |
| 05/08/13 | Liriano, Pedro activated |
| 05/07/13 | Limonta, Johan sold to San Diego Padres |
| 05/02/13 | Judy, Josh sold to Los Angeles Angels of Anaheim |
| 04/30/13 | DeLeon, Sandy released |
| 04/30/13 | Regas, Kris activated |
| 04/27/13 | DeLeon, Sandy signed |
| 04/27/13 | Regas, Kris placed on inactive list |
| 04/24/13 | Lewis, Rommie signed |
| 04/20/13 | Pease, Dustin signed |
| 04/10/13 | Gonzalez, Andy signed |
| 03/29/13 | Patterson, Eric signed |
| 03/29/13 | Wuertz, Michael signed |
| 03/25/13 | Torres, Joe signed |
| 03/25/13 | DePaula, Julio signed |
| 03/22/13 | Batista, Wilson signed |
| 03/22/13 | Tomko, Brett signed |
| 03/15/13 | Green, Nick signed |
| 03/15/13 | Rincon, Juan signed |
| 03/15/13 | Burgamy, Brian signed |
| 03/08/13 | Penney, Stephen signed |
| 03/08/13 | Repko, Jason signed |
| 03/01/13 | Judy, Josh signed |
| 03/01/13 | Limonta, Johan signed |
| 02/22/13 | Fox, Matt signed |
| 02/22/13 | Fiorentino, Jeff signed |
| 02/15/13 | Thurman, Corey signed |
| 02/15/13 | Graham, Tyler signed |
| 02/08/13 | Perez, Andres signed |
| 02/08/13 | Teufel, Shawn signed |
| 01/30/13 | Paniagua, Salvador signed |
| 01/30/13 | Novoa, Yunior signed |
| 01/30/13 | Regas, Kris signed |
| 01/24/13 | Marte, Andy signed |
| 01/24/13 | Cody, Chris signed |