Mets Roster & Staff
Transactions
| Date | Transaction |
| 08/31/18 | New York Mets placed C Kevin Plawecki on the paternity list. |
| 08/31/18 | New York Mets recalled Jacob Rhame from Las Vegas 51s. |
| 08/30/18 | New York Mets signed free agent RHP Kevin Gomez to a minor league contract. |
| 08/30/18 | RHP Jacob Rhame returned to Las Vegas 51s from New York Mets. |
| 08/29/18 | New York Mets signed free agent SS Warren Saunders to a minor league contract. |
| 08/29/18 | New York Mets recalled Jacob Rhame from Las Vegas 51s. |
| 08/28/18 | New York Mets activated CF Brandon Nimmo from the 10-day injured list. |
| 08/28/18 | New York Mets traded RF Jose Bautista to Philadelphia Phillies for Player To Be Named Later. |
| 08/28/18 | New York Mets sent 3B David Wright on a rehab assignment to Las Vegas 51s. |
| 08/25/18 | New York Mets sent RF Brandon Nimmo on a rehab assignment to St. Lucie Mets. |
| 08/25/18 | New York Mets signed free agent OF Gerson Molina to a minor league contract. |
| 08/24/18 | New York Mets optioned 1B Dominic Smith to Las Vegas 51s. |
| 08/24/18 | New York Mets recalled Tomas Nido from Binghamton Rumble Ponies. |
| 08/24/18 | New York Mets activated RF Jay Bruce from the 10-day disabled list. |
| 08/24/18 | New York Mets optioned SS Jack Reinheimer to Las Vegas 51s. |
| 08/23/18 | New York Mets signed free agent SS William Lugo to a minor league contract. |
| 08/20/18 | 1B Dominic Smith returned to Las Vegas 51s from New York Mets. |
| 08/20/18 | New York Mets placed CF Brandon Nimmo on the 10-day disabled list retroactive to August 17, 2018. Bruised left index finger. |
| 08/20/18 | New York Mets recalled Dominic Smith from Las Vegas 51s. |
| 08/19/18 | New York Mets recalled Dominic Smith from Las Vegas 51s. |
| 08/17/18 | New York Mets selected the contract of Daniel Zamora from Binghamton Rumble Ponies. |
| 08/17/18 | New York Mets placed RHP Bobby Wahl on the 10-day disabled list. Right hamstring strain. |
| 08/17/18 | New York Mets transferred 3B Phillip Evans from the 10-day disabled list to the 60-day disabled list. Fractured left tibia. |
| 08/17/18 | RHP Jacob Rhame returned to Las Vegas 51s from New York Mets. |
| 08/16/18 | New York Mets activated LHP Steven Matz. |
| 08/16/18 | New York Mets optioned RHP Tim Peterson to Las Vegas 51s. |
| 08/16/18 | New York Mets signed free agent C Domenico Pascale to a minor league contract. |
| 08/16/18 | New York Mets recalled Jacob Rhame from Las Vegas 51s. |
| 08/14/18 | New York Mets sent RF Jay Bruce on a rehab assignment to St. Lucie Mets. |
| 08/13/18 | New York Mets recalled Jack Reinheimer from Las Vegas 51s. |
| 08/13/18 | New York Mets optioned RHP Jacob Rhame to Las Vegas 51s. |
| 08/13/18 | New York Mets optioned Luis Guillorme to Las Vegas 51s. |
| 08/13/18 | New York Mets recalled Tim Peterson from Las Vegas 51s. |
| 08/12/18 | New York Mets sent 3B David Wright on a rehab assignment to St. Lucie Mets. |
| 08/07/18 | New York Mets signed free agent RHP Ronny Rincones to a minor league contract. |
| 08/06/18 | New York Mets sent Kevin Kaczmarski outright to Las Vegas 51s. |
| 08/05/18 | New York Mets recalled Jacob Rhame from Las Vegas 51s. |
| 08/05/18 | New York Mets placed RHP Anthony Swarzak on the 10-day disabled list retroactive to August 4, 2018. Right shoulder inflammation. |
| 08/04/18 | New York Mets signed free agent LHP Matt Gage to a minor league contract. |
| 08/04/18 | New York Mets traded RHP Eric Villanueva to Detroit Tigers for cash. |
| 08/03/18 | New York Mets recalled Corey Oswalt from Las Vegas 51s. |
| 08/03/18 | 2B Dylan Tice assigned to New York Mets. |
| 08/03/18 | New York Mets placed LHP Steven Matz on the 10-day disabled list retroactive to August 1, 2018. Flexor pronator strain in left arm. |
| 08/02/18 | New York Mets optioned RHP Jacob Rhame to Las Vegas 51s. |
| 08/02/18 | New York Mets selected the contract of RHP Bobby Wahl from Las Vegas 51s. |
| 08/02/18 | New York Mets placed 3B Phillip Evans on the 10-day disabled list. Fractured left tibia. |
| 08/02/18 | New York Mets designated RF Kevin Kaczmarski for assignment. |
| 08/02/18 | New York Mets activated 3B Todd Frazier from the 10-day injured list. |
| 08/01/18 | New York Mets signed free agent OF Luis Santana to a minor league contract. |
| 08/01/18 | New York Mets optioned RHP Tim Peterson to Las Vegas 51s. |
| 08/01/18 | New York Mets activated RHP Noah Syndergaard from the 10-day injured list. |