Rea left Saturday's game in the fourth inning with an apparent injury, Joe Frisaro of MLB.com reports.
It wasn't obvious what was ailing Rea, but he signaled to the dugout after striking out Jedd Gyorko to start the fourth and promptly left the game. He was replaced on the mound by David Phelps. Rea was making his first start Miami after coming over from San Diego in a trade the day before.