The Mets and Collins have not discussed an extension on his contract, which expires at the end of the 2016-17 season.
The Mets have had a disappointing season, but Collins said again this week that he has not decided on his future.
Collins, 68, is in his seventh season as the Mets manager. The team has a 546-578 record under Collins, and the Mets reached the postseason in two of his seasons.
Expected to contend for a playoff spot this season, the Mets have struggled to a 65-87 record. Injuries, especially to the Mets' pitchers, have played a role in New York's poor season.