D-backs Roster & Staff
Transactions
| Date | Transaction |
| 12/22/11 | Arizona Diamondbacks signed free agent 1B Mike Jacobs to a minor league contract. |
| 12/20/11 | Arizona Diamondbacks signed free agent Jason Kubel. |
| 12/19/11 | Arizona Diamondbacks signed free agent C Mark Reed to a minor league contract. |
| 12/14/11 | Arizona Diamondbacks signed free agent RHP Takashi Saito. |
| 12/13/11 | Arizona Diamondbacks signed free agent Jonathan Albaladejo. |
| 12/12/11 | LHP Joe Saunders elected free agency. |
| 12/12/11 | RHP Micah Owings elected free agency. |
| 12/09/11 | Oakland Athletics traded cash, LHP Craig Breslow and RHP Trevor Cahill to Arizona Diamondbacks for RF Collin Cowgill, RHP Jarrod Parker and RHP Ryan Cook. |
| 12/09/11 | Oakland Athletics traded cash, LHP Craig Breslow and RHP Trevor Cahill to Arizona Diamondbacks for RF Collin Cowgill, RHP Jarrod Parker and RHP Ryan Cook. |
| 12/09/11 | Arizona Diamondbacks signed free agent Lyle Overbay. |
| 12/09/11 | Oakland Athletics traded cash, LHP Craig Breslow and RHP Trevor Cahill to Arizona Diamondbacks for RF Collin Cowgill, RHP Jarrod Parker and RHP Ryan Cook. |
| 12/09/11 | Oakland Athletics traded cash, LHP Craig Breslow and RHP Trevor Cahill to Arizona Diamondbacks for RF Collin Cowgill, RHP Jarrod Parker and RHP Ryan Cook. |
| 12/09/11 | Oakland Athletics traded cash, LHP Craig Breslow and RHP Trevor Cahill to Arizona Diamondbacks for RF Collin Cowgill, RHP Jarrod Parker and RHP Ryan Cook. |
| 12/09/11 | Oakland Athletics traded cash, LHP Craig Breslow and RHP Trevor Cahill to Arizona Diamondbacks for RF Collin Cowgill, RHP Jarrod Parker and RHP Ryan Cook. |
| 12/08/11 | Arizona Diamondbacks claimed Brett Lorin off waivers from Bradenton Marauders. |
| 12/06/11 | Arizona Diamondbacks signed free agent Joe Martinez. |
| 12/03/11 | Arizona Diamondbacks invited non-roster RF Jason Lane to spring training. |
| 12/01/11 | Arizona Diamondbacks signed free agent 3B Cody Ransom to a minor league contract and invited him to spring training. |