Since their inception in 1962, the New York Mets have had 21 managers (23 if you include Carlos Beltran and Luis Rojas), including four interim managers and three who have gone on to be elected to the Hall of Fame.
Davey Johnson is the winningest manager in franchise history. He managed the Mets from 1984-1990, compiling a 595–417 record (.588 winning percentage), including a World Series title in 1986.
Willie Randolph had the second highest winning percentage in team history (.544). In 555 games (2005-2008), Randolph compiled a 302-253 record including a division title in 2006.
Gil Hodges, who managed the Mets from 1968-1971, led the team to their first World Series title (1969). Hodges managed 648 games and a .523 winning percentage (339-303).
Terry Collins is the longest-tenured manager in franchise history, with 1,134 games over seven seasons. Collins led the Mets to the World Series in 2015 against the Kansas City Royals and a Wild Card appearance in 2016 vs. San Francisco Giants.
Conversely, the worst winning percentage over a full season or more in franchise history is held by Casey Stengel, who posted a 175–404 (.302) record from 1962 to 1965.
The Mets let Mickey Callaway go after two seasons (2018-2019) and hired former Mets player Carlos Beltran as the team’s 22nd manager in franchise history. Beltran was dismissed after it was revealed he contributed to the sign-stealing scandal with the Houston Astros. The Mets subsequently hired Luis Rojas prior to Spring Training 2020.