Mets Roster & Staff
Transactions
| Date | Transaction |
| 04/27/09 | New York Mets selected the contract of Ken Takahashi from Buffalo Bisons. |
| 04/27/09 | New York Mets designated Casey Fossum for assignment. |
| 04/25/09 | Stefan Welch assigned to Savannah Sand Gnats from New York Mets. |
| 04/25/09 | 1B Stefan Welch assigned to New York Mets. |
| 04/25/09 | New York Mets signed free agent 3B Mike Lamb to a minor league contract. |
| 04/24/09 | Nelson Figueroa elected free agency. |
| 04/22/09 | RHP Freddy Garcia assigned to Buffalo Bisons from New York Mets. |
| 04/22/09 | Texas Rangers claimed RHP Darren O'Day off waivers from New York Mets. |
| 04/22/09 | New York Mets sent Nelson Figueroa outright to Buffalo Bisons. |
| 04/21/09 | 2B Andy Green assigned to Buffalo Bisons from New York Mets. |
| 04/19/09 | New York Mets designated RHP Nelson Figueroa for assignment. |
| 04/19/09 | New York Mets purchased LHP Casey Fossum from Buffalo Bisons. |
| 04/18/09 | New York Mets purchased RHP Nelson Figueroa from Buffalo Bisons. |
| 04/18/09 | New York Mets designated RHP Darren O'Day for assignment. |
| 04/17/09 | New York Mets placed C Brian Schneider on the 15-day disabled list retroactive to April 16, 2009. Muscle strain in middle of back |
| 04/17/09 | New York Mets purchased Omir Santos from Buffalo Bisons. |
| 04/11/09 | New York Mets purchased RHP Livan Hernandez from Buffalo Bisons. |
| 04/11/09 | New York Mets designated Marlon Anderson for assignment. |
| 04/05/09 | New York Mets placed LHP Billy Wagner on the 15-day disabled list retroactive to March 27, 2009. |
| 04/05/09 | New York Mets placed RHP Tim Redding on the 15-day disabled list retroactive to March 27, 2009. |
| 04/05/09 | New York Mets placed CF Angel Pagan on the 15-day disabled list retroactive to March 27, 2009. |