The NY Mets are concerned about their star outfielder Yoenis Cespedes -- saying he didn't show up to the ballpark for Sunday's game -- and hasn't checked in with team officials.
In other words, they're concerned he may have gone missing.
The Mets are currently playing the Braves in Atlanta. Cespedes WAS in attendance for Saturday's game ... but never made it back to the field on Sunday.
The Mets issued a statement saying ... "As of game time, Yoenis Céspedes has not reported to the ballpark today. He did not reach out to management with any explanation for his absence.