Mays's "decline" was primarily due to the fact that he misjudged one fly ball in the playoffs. Admittedly, Mays was known to be a terrific defender, so that sort of thing was unusual for him, but everyone makes mistakes. And he still could hit: his OPS+ in 1972 was a healthy 131. Mays wanted to retire then, but was persuaded to come back one more year. He didn't play all that well, but his OPS+ was 81, so he wasn't exactly an embarrassment, especially since their regular center fielder, Don Hahn had and OPS of 67 (and it was higher then Grote's and about the same as Harrelson's). About the only thing he was guilty of was not being a young Willie Mays. The myth is probably the second biggest bit of counterfactual "common knowledge" in Mets history, almost as bad as the myth that the Mets should have known not to trade Nolan Ryan (all statistics -- including modern ones -- show that Ryan was regressing at an alarming rate and was likely to be a bust).