Mets Roster & Staff
Transactions
| Date | Transaction |
| 08/26/09 | New York Mets recalled Lance Broadway from Buffalo Bisons. |
| 08/26/09 | New York Mets placed LHP Oliver Perez on the 15-day disabled list. Patellar tendinitis in his right knee. |
| 08/25/09 | New York Mets recalled Nick Evans from Buffalo Bisons. |
| 08/25/09 | New York Mets recalled Pat Misch from Buffalo Bisons. |
| 08/25/09 | New York Mets placed LHP Johan Santana on the 15-day disabled list retroactive to August 21, 2009. Bone chips in his left elbow. |
| 08/25/09 | New York Mets traded LHP Billy Wagner to Boston Red Sox. |
| 08/24/09 | New York Mets recalled LHP Ken Takahashi from Buffalo Bisons. |
| 08/24/09 | New York Mets optioned LHP Pat Misch to Buffalo Bisons. |
| 08/24/09 | New York Mets optioned Andy Green to Buffalo Bisons. |
| 08/22/09 | New York Mets recalled Pat Misch from Buffalo Bisons. |
| 08/22/09 | New York Mets designated Andy Green for assignment. |
| 08/22/09 | Pat Misch roster status changed by New York Mets. |
| 08/20/09 | Billy Wagner roster status changed by New York Mets. |
| 08/20/09 | New York Mets released RHP Livan Hernandez. |
| 08/18/09 | New York Mets selected the contract of Wilson Valdez from Buffalo Bisons. |
| 08/18/09 | New York Mets placed SS Alex Cora on the 60-day disabled list retroactive to August 13, 2009. Ligament injuries to both thumbs. |
| 08/17/09 | New York Mets selected the contract of 3B Andy Green from Buffalo Bisons. |
| 08/17/09 | David Wright roster status changed by New York Mets. |
| 08/17/09 | New York Mets signed C Jeff Glenn. |
| 08/17/09 | New York Mets signed LHP Steven Matz. |
| 08/16/09 | New York Mets placed 3B David Wright on the 15-day disabled list. |
| 08/07/09 | New York Mets designated SS Angel Berroa for assignment. |
| 08/07/09 | New York Mets activated SS Anderson Hernandez. |
| 08/06/09 | St. Lucie Mets Traded 2B Greg Veloz to Potomac Nationals and Washington Nationals Traded 2B Anderson Hernandez to New York Mets. |
| 08/06/09 | New York Mets transferred RHP J.J. Putz from the 15-day disabled list to the 60-day disabled list. |
| 08/06/09 | New York Mets selected the contract of RHP Elmer Dessens from Buffalo Bisons. |
| 08/06/09 | New York Mets placed LHP Jon Niese on the 60-day disabled list. torn right hamstring |
| 08/04/09 | New York Mets optioned Robinson Cancel to Buffalo Bisons. |
| 08/03/09 | New York Mets optioned Pat Misch to Buffalo Bisons. |
| 08/03/09 | New York Mets selected the contract of RHP Nelson Figueroa from Buffalo Bisons. |
| 08/03/09 | New York Mets sent Elmer Dessens outright to Buffalo Bisons. |
| 08/02/09 | New York Mets designated Robinson Cancel for assignment. |
| 08/02/09 | New York Mets activated LF Gary Sheffield from the 15-day disabled list. |