| Latest Transactions |
| DATE | TRANSACTION |
| November 21, 2009 | Purchased the contracts of RHP Alberto Alburquerque, RHP Edgmer Escalona, C Michael McKenry and RHP Chaz Roe from Albuquerque (PCL) and RHP Juan Nicasio from Tulsa (Texas). |
| November 19, 2009 | Agreed to terms with manager Jim Tracy on a three-year contract. |
| November 13, 2009 | Declined the 2010 contract option on RHP Rafael Betancourt. |
| November 6, 2009 | Declined 2010 contract options on LHP Alan Embree and C Yorvit Torrealba. |
| November 6, 2009 | Agreed to terms with RHP Matt Belisle and LHP Randy Flores on one-year contracts. Assigned RHP Joel Peralta and INF Omar Quintanilla outright to Colorado Springs (PCL) and Peralta elected to become a free agent. |
| September 8, 2009 | SP Adam Eaton designated for assignment; RP Matt Belisle purchased from minors; 2B Mike McCoy purchased from minors; RP Jhoulys Chacin called up from minors; LF Matt Murton called up from minors |
| September 1, 2009 | RP Randy Flores called up from minors; RP Joel Peralta called up from minors; C Paul Phillips purchased from minors; 1B Jason Giambi purchased from minors |
| August 31, 2009 | SP Jose Contreras acquired via trade from the Chicago White Sox |
| August 26, 2009 | Reinstated pitcher Juan Rincon from the 15-day disabled list.; LF Matt Murton designated for assignment |
| August 25, 2009 | CF Dexter Fowler placed on 15-day DL; SP Adam Eaton sent to minors; LF Matt Murton called up from minors; 2B Eric Young Jr. called up from minors |
| August 24, 2009 | Agreed to a minor league contract with first baseman Jason Giambi. |
| August 22, 2009 | Placed pitcher Aaron Cook on the 15-day disabled list; purchased the contract of pitcher Matt Herges; transferred pitch Manuel Corpas to the 60-day disabled list. |
| August 12, 2009 | Selected the contract of pitcher Adam Eaton from Colorado Springs of the Pacific Coast League (PCL); optioned pitcher Jhoulys Chacin to Colorado; transferred Alan Embree to the 60-day disabled list. |
| August 1, 2009 | Placed pitcher Juan Rincon on the 15-day disabled list, retroactive to July 31. |
| July 31, 2009 | Acquired pitcher Joe Beimel and cash from the Washington Nationals for pitchers Ryan Mattheus and Robinson Fabian. |
| July 29, 2009 | Sent pitcher Ryan Speier outright to Colorado Springs of the Pacific Coast League (AAA). |
| July 25, 2009 | Purchased the contract of pitcher Jhoulys Chacin from Tulsa of the Texas League (AA); placed Manuel Corpas on the 15-day disabled list, retroactive to July 21; designated pitcher Ryan Speier for assignment. |
| July 24, 2009 | Acquired pitcher Rafael Betancourt from the Cleveland Indians for pitcher Connor Graham. |
| July 22, 2009 | Reinstated pitcher Ryan Speier from the 15-day disabled list; optioned pitcher Joel Peralta to Colorado Springs of the Pacific Coast League (AAA). |
| July 16, 2009 | Activated pitcher Manuel Corpas from the 15-day disabled list; designated pitcher Matt Belisle for assignment. |
| July 12, 2009 | Purchased the contract of pitcher Matt Belisle from Colorado Springs of the Pacific Coast League (AAA); placed pitcher Alan Embree on the 15-day disabled list. |
| July 11, 2009 | Sent pitcher Jason Hirsh outright to Colorado Springs of the Pacific Coast League (AAA). |
| July 8, 2009 | Optioned pitcher Randy Flores to Colorado Springs of the Pacific Coast League (AAA); recalled pitcher Franklin Morales from Colorado Springs; agreed to terms with pitcher Rex Brothers, third baseman Nolan Arenado and first baseman Ben Paulsen. |
| July 4, 2009 | Activated catcher Yorvit Torrealba from the restricted list; designated catcher Paul Phillips for assignment. |
| June 21, 2009 | Placed pitcher Manuel Corpas on the 15-day disabled list, retroactive to Friday; purchased the contract of pitcher Juan Rincon from Colorado Springs on the Pacific Coast League (AAA). |
| June 9, 2009 | Activated catcher Chris Iannetta from the 15-day disabled list; optioned catcher Edwin Bellorin to Colorado Springs of the Pacific Coast League (AAA). |
| June 6, 2009 | Activated pitcher Matt Daley from the 15-day disabled list; recalled outfielder Carlos Gonzalez from Colorado Springs of the Pacific Coast League (AAA); designated pitcher Jason Grilli for assignment; optioned outfielder Matt Murton to Colorado Springs. |
| June 5, 2009 | Placed catcher Yorvit Torrealba on the restricted list; purchased the contract of catcher Edwin Bellorin from Colorado Springs of the Pacific Coast League (AAA). |
| June 2, 2009 | Purchased the contract of catcher Edwin Bellorin from Colorado Springs of the Pacific Coast League (AAA); placed catcher Yorvit Torrealba on the restricted list. |
| May 30, 2009 | Fired manager Clint Hurdle; named Jim Tracy interim manager. |