| Latest Transactions |
| DATE | TRANSACTION |
| November 21, 2009 | Purchased the contracts of INF Cole Gillespie from Reno (PCL) and RHP Roque Mercedes, RHP Daniel Stange and LHP Jordan Norberto from Mobile (SL). |
| November 20, 2009 | Traded LHP Scott Maine and INF Ryne White to the Chicago Cubs for RHP Aaron Heilman. |
| November 12, 2009 | Named Matt Williams first-base coach and Bo Porter third-base coach. |
| November 11, 2009 | COLORADO ROCKIES-Named David Dunne spring training operations manager. |
| November 6, 2009 | Exercised the 2010 contract option RHP Brandon Webb. |
| November 6, 2009 | Declined their 2010 contract option on INF Chad Tracy. |
| October 10, 2009 | Acquired INF Tony Abreu from the Los Angeles Dodgers to complete an earlier trade. |
| October 6, 2009 | Announced third base coach Chip Hale and first base coach Lorenzo Bundy will not return. Signed Kirk Gibson, bench coach, to a two-year contract extension. |
| September 8, 2009 | C Luke Carlin called up from minors; LF Trent Oeltjen called up from minors |
| September 2, 2009 | SP Bryan Augenstein called up from minors |
| August 31, 2009 | RP Chad Qualls placed on 60-day DL; RP Billy Buckner called up from minors |
| August 29, 2009 | RP Daniel Schlereth called up from minors; CF Chris Young called up from minors; C Chris Snyder placed on 15-day DL; LF Trent Oeltjen sent to minors |
| August 28, 2009 | C John Hester purchased from minors |
| August 26, 2009 | RP Daniel Schlereth sent to minors |
| August 12, 2009 | Placed pitcher Scott Schoeneweis on the 15-day disabled list; recalled pitcher Daniel Schlereth from Mobile of the Southern League (AA); released pitcher Tom Gordon. |
| August 11, 2009 | Signed pitcher Daniel Cabrera to a minor league contract and assigned him to Reno of the Pacific Coast League (AAA); purchased the contract of second baseman Rusty Ryal from Reno; optioned outfielder Chris Young to Reno. |
| August 8, 2009 | Placed outfielder Justin Upton on the 15-day disabled list; purchased the contract of outfielder Trent Oeltjen from Reno of the Pacific Coast League (AAA). |
| August 5, 2009 | Optioned pitcher Dustin Nippert to Tucson of the Pacific Coast League (AAA). |
| July 29, 2009 | Activated catcher Chris Snyder from the 15-day disabled list; optioned catcher Luke Carlin to Reno of the Pacific Coast League (AAA). |
| July 20, 2009 | Recalled third baseman Ryan Roberts from Reno of the Pacific Coast League (AAA). |
| July 20, 2009 | Acquired outfielder Cole Gillespie and pitcher Roque Mercedes from the Milwaukee Brewers for infielder Felipe Lopez. |
| July 16, 2009 | Recalled first baseman Josh Whitesell from Reno of the Pacific Coast League (AAA). |
| July 13, 2009 | Released first baseman Tony Clark. |
| July 12, 2009 | Recalled pitcher Leo Rosales from Reno of the Pacific Coast League (AAA); optioned pitcher Doug Slaten to Reno. |
| July 9, 2009 | Recalled pitcher Doug Slaten from Reno of the Pacific Coast League (AAA). |
| July 5, 2009 | Activated pitcher Yusmeiro Petit from the 15-day disabled list; optioned third baseman Ryan Roberts to Reno of the Pacific Coast League (AAA). |
| July 1, 2009 | Activated first baseman Chad Tracy from the 15-day disabled list; optioned pitcher Leo Rosales to Reno of the Pacific Coast League (AAA). |
| June 29, 2009 | Optioned pitcher Billy Buckner to Reno of the Pacific Coast League (AAA); recalled pitcher Leo Rosales from Reno. |
| June 26, 2009 | Placed outfielder Eric Byrnes on the 15-day disabled list; transferred pitcher Tom Gordon from the 15-day to the 60-day disabled list; purchased the contract of outfielder Alex Romero from Reno of the Pacific Coast League (AAA). |
| June 24, 2009 | Placed catcher Chris Snyder on the 15-day disabled list, retroactive to Sunday; purchased the contract of catcher Luke Carlin from Reno of the Pacific Coast League (AAA); transferred outfielder Conor Jackson to the 60-day disabled list. |
| June 21, 2009 | Activated first baseman Tony Clark from the 15-day disabled list; optioned first baseman Josh Whitesell to Reno of the Pacific Coast League (AAA). |
| June 9, 2009 | Reinstated pitcher Scott Schoeneweis from the restricted list; claimed pitcher Blaine Boyer off waivers from St. Louis; assigned pitcher Leo Rosales to Reno of the Pacific Coast League (AAA) and pitcher Daniel Schlereth to Mobile of the Southern League (AA). |
| June 9, 2009 | Claimed pitcher Blaine Boyer off waivers from the St. Louis Cardinals; named Mike Berger director player development. |
| May 30, 2009 | Placed first baseman Chad Tracy on the 15-day disabled list; recalled first baseman Josh Whitesell from Reno of the Pacific Coast League (AAA). |
| May 30, 2009 | Optioned pitcher Doug Slaten to Reno of the Pacific Coast League (AAA); purchased the contract of pitcher Daniel Schlereth from Mobile of the Southern League (AA). |
| May 30, 2009 | Placed pitcher Scott Schoeneweis on the restricted list. |