In the early years of the New York Mets, the roster was made up of relatively younger players with several seasons of veterans past their prime. When looking at the franchise’s history, all seasons where the position players’ average age was 27 or younger happened in 1971 or earlier. The results of this were mixed to extremes with the 1969 team standing out most positively.
Focusing on the present day, the average age of a position player on the 2019 Mets is 27.8. This is weighted for the number of at-bats a player receives so Rajai Davis’ 38 years on earth and small number of plate appearances do not factor in largely.