Mejia had tests on his elbow after he was unable to pitch in Monday's game against the Washington Nationals. He said he had pain extending the back of his elbow, and manager Terry Collins said he had a "hard time" getting loose.
Mejia did not speak with reporters after game.
Mejia complained of soreness in the elbow before the game. He attempted to warm up before the ninth inning but was forced to sit back down. Jerry Blevins recorded the first out of the ninth inning and 37-year-old Buddy Carlyle earned his first career save by getting the final two outs of the game.
Mejia, 25, is entering his first full season as the Mets' closer. He started seven games last season but took over the closer's role in May after Bobby Parnell had Tommy John surgery and Jose Valverde lost the job. Mejia converted 28 of his 31 save opportunities.
Collins said set-up man Jeurys Familia will close if Mejia misses time.
- Dan Gartland