| Latest Transactions |
| DATE | TRANSACTION |
| November 21, 2009 | Purchased the contracts of RHP Enerio Del Rosario, OF Chris Heisey, RHP Logan Ondrusek, INF Chris Valaika, and LHP Travis Wood from Louisville (IL) and RHP Jordan Smith and LHP Philippe Valiquette from Carolina (SL). Sent RHP Daryl Thompson outright to Louisville. Announced OF Laynce Nix refused an outright assignment and elected free agency. |
| November 17, 2009 | Declined their 2010 contract option on C Ramon Hernandez and agreed to terms with on a one-year contract. |
| November 13, 2009 | Named David Bell manager, Ryan Jackson hitting coach, Tom Brown pitching coach and Jimmy Mattocks athletic trainer for Carolina (SL). |
| November 12, 2009 | Announced the resignation of trainer Mark Mann. Announced Lynchburg (Carolina) will replace Sarasota (FSL) as their Advanced-Class A affiliate next season. |
| November 10, 2009 | Reinstated UT Wilkin Castillo from the 60-day DL, assigned him outright off the 40-man roster and agreed to terms with him on a minor league contract. Announced OF Darnell McDonald has elected to become a free agent. |
| November 6, 2009 | Reinstated INF Danny Richar from the 60-day DL and assigned him outright off the roster, making him a free agent. Assigned 1B Kevin Barker outright off the roster and Barker elected free agency. Assigned OF Darnell McDonald outright off the roster. Assigned C Corky Miller outright off the roster and Miller agreed to a minor league contract with Louisville (IL). Signed RHP Justin Lehr to a one-year contract and assigned him outright to Louisville. |
| October 18, 2009 | Named Bryan Price pitching coach. |
| October 3, 2009 | Fired pitching coach Dick Pole. Renewed the contracts of third base coach Mark Berry, first base coach Billy Hatcher, hitting coach Brook Jacoby, bullpen coach Juan Lopez, bench coach Chris Speier and bullpen catcher Mike Stefanski. |
| October 1, 2009 | Activated OF Chris Dickerson from the 15-day DL. |
| September 23, 2009 | Activated OF Willy Taveras from the 15-day DL. |
| September 19, 2009 | Activated C Ramon Hernandez from the 15-day DL. |
| September 16, 2009 | Activated OF Laynce Nix from the 15-day DL. |
| September 15, 2009 | Activated OF Laynce Nix from the 15-day DL. |
| September 8, 2009 | SP Matt Maloney called up from minors |
| September 7, 2009 | RP Carlos Fisher called up from minors |
| September 2, 2009 | 2B Danny Richar transferred to 60-day DL; RP Pedro Viola purchased from minors |
| August 31, 2009 | 1B Kevin Barker called up from minors; RP Ramon Ramirez called up from minors; LF Laynce Nix placed on 15-day DL; SP Matt Maloney sent to minors; RP Carlos Fisher sent to minors |
| August 29, 2009 | 1B Kevin Barker sent to minors; SP Matt Maloney called up from minors |
| August 25, 2009 | RP Mike Lincoln transferred to 60-day DL |
| August 25, 2009 | SP Edinson Volquez transferred to 60-day DL |
| August 23, 2009 | Placed pitcher Aaron Harang on the 15-day disabled list, retroactive to Saturday; activated third baseman Scott Rolen from the 15-day disabled list. |
| August 20, 2009 | Placed pitcher Johnny Cueto on the 15-day disabled list, retroactive to Sunday; activated pitcher Micah Owings from the 15-day disabled list. |
| August 20, 2009 | Placed outfielder Willy Taveras on the 15-day disabled list; recalled outfielder Drew Stubbs of the International League (AAA). |
| August 19, 2009 | Signed pitchers Mike Leake and Brad Boxberger. |
| August 14, 2009 | Selected infielder Kevin Barker from Louisville of the International League (AAA). |
| August 12, 2009 | Activated outfielder Chris Dickerson from the 15-day disabled list; placed third baseman Scott Rolen on the 15-day disabled list, retroactive to Saturday. |
| August 11, 2009 | Activated pitcher Jared Burton from the 15-day disabled list. |
| August 10, 2009 | Traded pitcher David Weathers to Milwaukee Brewers for a player to be named. |
| July 31, 2009 | Acquired third baseman Scott Rolen from the Toronto Blue Jays for pitchers Josh Roenicke, Zachary Stewart and third baseman Edwin Encarnacion. |
| July 28, 2009 | Placed outfielder Chris Dickerson and pitcher Micah Owings on the 15-day disabled list; recalled shortstop Drew Sutton and pitcher Robert Manuel from Louisville of the International League (AAA). |
| July 27, 2009 | Placed on the 15-day disabled list pitcher Jared Burton, retroactive to July 25, and recalled pitcher Josh Roenicke from Louisville of the International League (AAA). |
| July 25, 2009 | Activated shortstop Alex Gonzalez from the 15-day disabled list; optioned shortstop Drew Sutton to Louisville of the International League (AAA). |
| July 20, 2009 | Placed catcher Ramon Hernandez on the 15-day disabled list, retroactive to Saturday; optioned pitcher Robert Manuel to Louisville of the International League (AAA); recalled pitcher Jared Burton and catcher Craig Tatum from Louisville. |
| July 17, 2009 | Recalled shortstop Drew Sutton from Louisville of the International League (AAA); optioned pitcher Josh Roenicke to Louisville. |
| July 13, 2009 | Placed oufielder Jay Bruce on the 15-day disabled list; recalled third baseman Adam Rosales from Louisville of the International Leauge (AAA). |
| July 8, 2009 | Recalled pitcher Robert Manuel from Louisville of the International League (AAA); optioned shortstop Drew Sutton to Louisville. |
| July 4, 2009 | Placed second baseman Danny Richar on the 15-day disabled list; activated third baseman Edwin Encarnacion from the 60-day disabled list. |
| July 4, 2009 | Optioned pitcher Jared Burton to Louisville of the International League (AAA); recalled shortstop Drew Sutton from Louisville. |
| June 29, 2009 | Recalled pitcher Homer Bailey from Louisville of the International League (AAA); optioned infielder Adam Rosales to Louisville. |
| June 26, 2009 | Acquired catcher Corky Miller from the Chicago White Sox for outfielder Norris Hopper. |
| June 24, 2009 | Activated first baseman Joey Votto from the 15-day disabled list; placed catcher/infielder/outfielder Wilkin Castillo on the 15-day disabled list, retroactive to Sunday. |
| June 21, 2009 | Placed shortstop Alex Gonzalez on the 15-day disabled list, retroactive to Friday; purchased the contract of second baseman Danny Richar from Louisville of the International League (AAA); optioned pitcher Matt Maloney to Louisville; recalled catcher/first baseman Wilkin Castillo from Louisville; transfered third baseman Edwin Encarnacion to the 60-day disabled list. |
| June 17, 2009 | Placed pitcher Mike Lincoln on the 15-day disabled list, retroactive to June 13; recalled pitcher Josh Roenicke from Louisville of the International League (AAA). |
| June 6, 2009 | Recalled pitcher Matt Maloney from Louisville of the International League (AAA); optioned catcher/infielder Wilkin Castillo to Louisville. |
| June 2, 2009 | Placed pitcher Edinson Volquez on the 15-day disabled list. |
| June 2, 2009 | Activated pitcher Edinson Volquez from the 15-day disabled list; optioned pitcher Jared Burton to Louisville of the International League (AAA). |
| May 30, 2009 | Placed first baseman Joey Votto on the 15-day disabled list; recalled catcher/infielder Wilkin Castillo from Louisville of the International League (AAA). |