On June 12, the Mets held the best record in baseball, a full 21 games over .500. They had stretched their NL East lead to 5 1/2 games with an 8 1/2-game margin for error in the fledgling playoff race.
Three and a half months later, their season ended without a postseason berth.
Over their final 93 games, the Mets went 38-55, producing a better record than only four teams: the bottom-feeding White Sox, Nationals, Twins and Rockies.
Source: mlb.com