The Mets posted their franchise record for losses in their inaugural season in the league, with 120 losses in 160 games in 1962. This was the first of seven consecutive losing seasons, a season in which the winning percentage was below .500, and the most losses by a post-1900 MLB team. During this stretch from 1962 to 1968, the Mets employed four managers. Five managers have taken the Mets to the postseason; Davey Johnson and Bobby Valentine have led the team to two playoff appearances each. Johnson and Gil Hodges are the only Mets managers to win a World Series: Hodges in 1969 against the Baltimore Orioles; and Johnson in 1986 against the Boston Red Sox. Johnson is the longest-tenured manager in franchise history, with 1,012 games of service over 7 seasons (1984–1989 and part of 1990).
The manager with the most wins and highest winning percentage over a full season or more is Johnson; his 595–417 record gives him a .588 winning percentage. Conversely, the worst winning percentage over a full season or more in franchise history is .302 by inaugural manager Casey Stengel, who posted a 175–404 record from 1962 to 1965.