According to the New York Post's Joel Sherman, the Mets didn't specify the nature of Cespedes' surgery.
Cespedes' fall and subsequent surgery add to a year in which almost everything has gone wrong for the Mets.
Jed Lowrie, who signed a two-year, $20 million deal, has yet to appear in a game for the team. He was recovering from a knee injury in spring training when he suffered a hamstring strain during a minor league rehab assignment earlier this month.
Robinson Cano is on pace to finish with career lows in batting average (.241) and slugging percentage (.371). The Mets placed both Cano and Jeff McNeil, one of their few bright spots on offense, on the injured list Wednesday.
The timing of the announcement about Cespedes puts a damper on the Mets' four-game sweep of the Washington Nationals. New York is still four games back of the first-place Philadelphia Phillies in the National League East, while it's 2.5 games back of the final wild-card place.
According to FanGraphs, the Mets only have a 25.1 percent chance of reaching the playoffs, and those odds won't improve with Cespedes unavailable for the duration of the season.