The Mets won their final regular-season home game Sunday at Citi Field, where they finished 44-37.
"It really kind of sunk in today," Noah Syndergaard said after the game. "The clubhouse was like, we don't want it to be the last game we play here this season."
The Mets are currently one game ahead of the Giants for the National League's top wild card, with the Cardinals a half-game behind San Francisco for the second spot.
The Mets have not been to consecutive postseasons since 1999 and 2000.
Mets players took to the field after Sunday's win to sign autographs and acknowledge fans, who repeatedly chanted, "We want playoffs," during the ninth inning.
The Mets have control of their own postseason fate, with six games left against the Marlins and Phillies, during which Noah Syndergaard and Bartolo Colon could be in line to pitch twice. If they stumble and don't get in, it'll be because the Mets dropped the ball.
Here's what you need to know about now and the rest of the season...
The Mets play three games in Miami against the Marlins starting tonight. Then, they move to play their final three games of the regular season against the Phillies at Citizen's Bank Park.
The Mets are 10-6 against the Marlins and 10-6 against the Phillies this season.
The Marlins are 10-12 this September and have lost three of their last four games. Similarly, the Phillies are 10-13 in September, and have lost three of their last four games.
The Giants have six games left, three against the Rockies and three against the Dodgers, all of which are in San Francisco. This season, the Giants are 8-8 against the Rockies and 8-8 against the Dodgers.
The Cardinals have seven games left in 2016, four against the Reds and three against the Pirates, all of which are in St. Louis. This season, the Cardinals are 8-7 against the Reds and 7-9 against the Pirates.