Athletics Roster & Staff
Transactions
| Date | Transaction |
| 06/29/09 | Oakland Athletics optioned Jack Hannahan to Sacramento River Cats. |
| 06/29/09 | Oakland Athletics signed RHP Chris Mederos. |
| 06/29/09 | Oakland Athletics signed RHP Connor Hoehn. |
| 06/29/09 | Oakland Athletics optioned 3B Jack Hannahan to Sacramento River Cats. |
| 06/28/09 | Oakland Athletics transferred LHP Josh Outman from the 15-day disabled list to the 60-day disabled list. |
| 06/28/09 | Oakland Athletics activated 2B Mark Ellis from the 60-day disabled list. |
| 06/28/09 | Oakland Athletics optioned Daric Barton to Sacramento River Cats. |
| 06/25/09 | Ryan Ortiz assigned to Vancouver Canadians from Oakland Athletics. |
| 06/25/09 | Chris Affinito assigned to AZL Athletics from Oakland Athletics. |
| 06/25/09 | Anthony Aliotti assigned to Vancouver Canadians from Oakland Athletics. |
| 06/24/09 | Oakland Athletics recalled Gio Gonzalez from Sacramento River Cats. |
| 06/24/09 | Oakland Athletics placed LHP Josh Outman on the 15-day disabled list retroactive to June 20, 2009. Sprained left elbow. |
| 06/24/09 | Oakland Athletics signed IF Chris Affinito. |
| 06/24/09 | Oakland Athletics signed Vicente Cafaro. |
| 06/22/09 | Oakland Athletics signed RHP Robert Gilliam. |
| 06/22/09 | Oakland Athletics signed 1B Anthony Aliotti. |
| 06/22/09 | Oakland Athletics signed C Ryan Ortiz. |
| 06/21/09 | LF Anthione Shaw assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Daniel Tenholder assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Mike Spina assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Myrio Richard assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Stephen Parker assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Mike Gilmartin assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Jeremy Wells assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Murphy Smith assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Michael Affronti assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Max Peterson assigned to AZL Athletics from Oakland Athletics. |
| 06/21/09 | Ryan Quigley assigned to AZL Athletics from Oakland Athletics. |
| 06/19/09 | Oakland Athletics signed Stephen Parker. |
| 06/19/09 | Oakland Athletics signed Mike Spina. |
| 06/19/09 | Oakland Athletics signed Myrio Richard. |
| 06/19/09 | Oakland Athletics signed Anthione Shaw. |
| 06/18/09 | 3B Blake Crosby assigned to AZL Athletics from Oakland Athletics. |
| 06/18/09 | A.J. Huttenlocker assigned to AZL Athletics from Oakland Athletics. |
| 06/18/09 | 2B Joel Eusebio assigned to AZL Athletics from Oakland Athletics. |
| 06/18/09 | Oakland Athletics activated RF Ryan Sweeney from the 15-day disabled list. |
| 06/18/09 | Oakland Athletics optioned Chris Denorfia to Sacramento River Cats. |
| 06/17/09 | Dan Straily assigned to Vancouver Canadians from Oakland Athletics. |
| 06/17/09 | Conner Crumbliss assigned to Vancouver Canadians from Oakland Athletics. |
| 06/17/09 | RHP Nate Long assigned to Vancouver Canadians from Oakland Athletics. |
| 06/17/09 | Ryan Quigley assigned to Vancouver Canadians from Oakland Athletics. |
| 06/17/09 | Paul Smyth assigned to Vancouver Canadians from Oakland Athletics. |
| 06/17/09 | Jeremy Wells assigned to Vancouver Canadians from Oakland Athletics. |
| 06/17/09 | Kent Walton assigned to Vancouver Canadians from Oakland Athletics. |
| 06/16/09 | Oakland Athletics signed Joel Eusebio. |
| 06/16/09 | Oakland Athletics signed RHP Murphy Smith. |
| 06/16/09 | Oakland Athletics signed LHP Max Peterson. |
| 06/16/09 | Oakland Athletics signed RHP Daniel Tenholder. |
| 06/16/09 | Oakland Athletics signed LHP Ryan Quigley. |
| 06/16/09 | Oakland Athletics signed 2B Kent Walton. |
| 06/16/09 | Oakland Athletics signed RHP Dan Straily. |
| 06/16/09 | Oakland Athletics signed RHP Nate Long. |
| 06/16/09 | Oakland Athletics signed 2B Mike Gilmartin. |
| 06/16/09 | Oakland Athletics signed 2B Conner Crumbliss. |
| 06/16/09 | Oakland Athletics signed RHP Paul Smyth. |
| 06/16/09 | Oakland Athletics signed 1B Blake Crosby. |
| 06/16/09 | Oakland Athletics signed 2B Jeremy Wells. |
| 06/16/09 | Oakland Athletics signed A.J. Huttenlocker. |
| 06/15/09 | Mark Ellis assigned to Stockton Ports from Oakland Athletics. |
| 06/14/09 | Oakland Athletics optioned Travis Buck to Sacramento River Cats. |
| 06/12/09 | Oakland Athletics optioned Aaron Cunningham to Sacramento River Cats. |
| 06/12/09 | Oakland Athletics activated 1B Nomar Garciaparra from the 15-day disabled list. |
| 06/09/09 | Oakland Athletics optioned SS Gregorio Petit to Sacramento River Cats. |
| 06/09/09 | Oakland Athletics recalled Chris Denorfia from Sacramento River Cats. |
| 06/08/09 | Oakland Athletics recalled Daric Barton from Sacramento River Cats. |
| 06/08/09 | Oakland Athletics placed CF Ryan Sweeney on the 15-day disabled list retroactive to June 3, 2009. Sprained left knee |
| 06/08/09 | Oakland Athletics sent RF Travis Buck on a rehab assignment to Sacramento River Cats. |
| 06/02/09 | Oakland Athletics selected the contract of RHP Vin Mazzaro from Sacramento River Cats. |
| 06/02/09 | Oakland Athletics signed RHP Ronny Morla. |
| 06/02/09 | Oakland Athletics optioned RHP Kevin Cameron to Sacramento River Cats. |
| 06/02/09 | Dan Giese roster status changed by Oakland Athletics. |