Mets Roster & Staff
Transactions
| Date | Transaction |
| 09/30/11 | Zach Lutz roster status changed by New York Mets. |
| 09/30/11 | New York Mets activated RF Scott Hairston from the 15-day disabled list. |
| 09/30/11 | New York Mets activated LHP Jon Niese from the 15-day disabled list. |
| 09/30/11 | Manny Alvarez roster status changed by New York Mets. |
| 09/30/11 | Fernando Martinez roster status changed by New York Mets. |
| 09/30/11 | Jenrry Mejia roster status changed by New York Mets. |
| 09/30/11 | Armando Rodriguez roster status changed by New York Mets. |
| 09/30/11 | Jordany Valdespin roster status changed by New York Mets. |
| 09/09/11 | New York Mets recalled Dale Thayer from Buffalo Bisons. |
| 09/09/11 | New York Mets sent Michael O'Connor outright to Buffalo Bisons. |
| 09/06/11 | New York Mets recalled Mike Baxter from Buffalo Bisons. |
| 09/06/11 | New York Mets selected the contract of Valentino Pascucci from Buffalo Bisons. |
| 09/06/11 | New York Mets transferred 1B Ike Davis from the 15-day disabled list to the 60-day disabled list. |
| 09/06/11 | New York Mets designated Michael O'Connor for assignment. |
| 09/06/11 | New York Mets selected the contract of Chris Schwinden from Buffalo Bisons. |
| 09/02/11 | Daniel Herrera roster status changed by New York Mets. |
| 09/01/11 | New York Mets transferred 1B Daniel Murphy from the 15-day disabled list to the 60-day disabled list. |
| 09/01/11 | Milwaukee Brewers Traded LHP Daniel Herrera to New York Mets and Wisconsin Timber Rattlers Traded RHP Adrian Rosario to St. Lucie Mets. |
| 09/01/11 | New York Mets transferred RHP Taylor Buchholz from the 15-day disabled list to the 60-day disabled list. |
| 09/01/11 | New York Mets recalled Josh Stinson from Binghamton Mets. |
| 09/01/11 | New York Mets selected the contract of Josh Satin from Buffalo Bisons. |