D-backs Roster & Staff
Transactions
| Date | Transaction |
| 12/30/09 | Arizona Diamondbacks signed free agent 2B Kelly Johnson. |
| 12/28/09 | Arizona Diamondbacks signed free agent RHP Bob Howry. |
| 12/28/09 | Arizona Diamondbacks signed free agent 1B Jeff Bailey to a minor league contract and invited him to spring training. |
| 12/12/09 | 1B Josh Whitesell elected free agency. |
| 12/10/09 | Arizona Diamondbacks claimed Zach Kroenke off waivers from Scranton/Wilkes-Barre Yankees. |
| 12/09/09 | New York Yankees Traded RHP Ian Kennedy to Arizona Diamondbacks; New York Yankees Traded CF Austin Jackson and LHP Phil Coke to Detroit Tigers; Detroit Tigers Traded CF Curtis Granderson to New York Yankees; Arizona Diamondbacks Traded LHP Daniel Schlereth and RHP Max Scherzer to Detroit Tigers and Detroit Tigers Traded RHP Edwin Jackson to Arizona Diamondbacks. |
| 12/09/09 | New York Yankees Traded RHP Ian Kennedy to Arizona Diamondbacks; New York Yankees Traded CF Austin Jackson and LHP Phil Coke to Detroit Tigers; Detroit Tigers Traded CF Curtis Granderson to New York Yankees; Arizona Diamondbacks Traded LHP Daniel Schlereth and RHP Max Scherzer to Detroit Tigers and Detroit Tigers Traded RHP Edwin Jackson to Arizona Diamondbacks. |
| 12/09/09 | New York Yankees Traded RHP Ian Kennedy to Arizona Diamondbacks; New York Yankees Traded CF Austin Jackson and LHP Phil Coke to Detroit Tigers; Detroit Tigers Traded CF Curtis Granderson to New York Yankees; Arizona Diamondbacks Traded LHP Daniel Schlereth and RHP Max Scherzer to Detroit Tigers and Detroit Tigers Traded RHP Edwin Jackson to Arizona Diamondbacks. |
| 12/09/09 | New York Yankees Traded RHP Ian Kennedy to Arizona Diamondbacks; New York Yankees Traded CF Austin Jackson and LHP Phil Coke to Detroit Tigers; Detroit Tigers Traded CF Curtis Granderson to New York Yankees; Arizona Diamondbacks Traded LHP Daniel Schlereth and RHP Max Scherzer to Detroit Tigers and Detroit Tigers Traded RHP Edwin Jackson to Arizona Diamondbacks. |
| 12/04/09 | Arizona Diamondbacks signed free agent RHP T.J. Beam to a minor league contract and invited him to spring training. |
| 12/04/09 | Arizona Diamondbacks signed free agent C Carlos Corporan to a minor league contract and invited him to spring training. |
| 12/04/09 | Arizona Diamondbacks signed free agent CF Drew Macias to a minor league contract and invited him to spring training. |
| 12/03/09 | Arizona Diamondbacks sent Kyler Newby outright to Reno Aces. |
| 12/03/09 | Arizona Diamondbacks sent Luke Carlin outright to Reno Aces. |