Here are the key 2018 MLB offseason dates, and how they impact the Mets...
Day after World Series ends (Between Oct. 28 and Nov. 1) : Free agency begins
The Mets should be making their GM hire right around the time free agency begins, meaning immediate pressure on whoever gets the gig to come up with a plan and start executing it. Outfielder Bryce Harper and shortstop/third baseman Manny Machado headline the free agent class. The Mets may look for a new catcher, and Yasmani Grandal and Wilson Ramos will both be available. Among the top tier starting pitchers available are Patrick Corbin and Dallas Keuchel. When it comes to relievers, Craig Kimbrel, Adam Ottavino, and old friend Jeurys Familia are among the headliners.
Jerry Blevins is the Mets' only truly notable free agent.
Nov. 14: Cy Young Award announced
Barring a monumental upset, Jacob deGrom will win the award. And he could do so in nearly unanimous fashion. If deGrom takes home the hardware as expected, he will join Tom Seaver, Dwight Gooden, and R.A. Dickey as the only Mets to win the Cy Young.
Nov. 30: Non-tender deadline
Players on the 40-man roster who have fewer than six years of major league service time must be tendered a contract each offseason by the non-tender deadline. This includes players who are due raises via arbitration. If a club non-tenders a player, he immediately becomes a free agent.
Among the Mets' non-tender candidates are Travis d'Arnaud and Rafael Montero.
Dec. 9: Winter Meetings begin in Las Vegas
After the General Manager's Meetings in November get the framework started for trades and signings, a whole bunch usually go down at the Winter Meetings.
Dec. 13: Rule 5 Draft
The Rule 5 Draft takes place on the final day of the Winter Meetings, with certain minor leaguers who are not on the 40-man roster available. If a team selects a player, they must keep that player on their 25-man roster for the entire season or be forced to offer him back to the team he was selected from.