Jenrry Mejia was dealing with a back/side issue during his appearance on Monday (Rubin, August 4).
Mejia entered in the ninth inning with the game tied and gave up the eventual game-winning run when he allowed a two-out run-scoring double to Pablo Sandoval.
During the outing, Mejia paused and appeared to be stretching out his back. Soon after, he was visited by pitching coach Dan Warthen, but remained in the game.
Mejia refused to blame the issue for his struggles on Monday, but noted that a similar issue in July kept him out of action for a few games.