Marlins starter Anthony DeSclafani left Friday night's game with a right forearm contusion after pitching only three innings.
DeSclafani, 24, was struck by a line drive back to the mound by Athletics first baseman Brandon Moss in the first inning, but remained in the game after throwing two warm up pitches in front of Marlins trainers.
After giving up two runs on four hits in the opening frame, the right-hander settled down and retired six of the next seven hitters he faced on only 22 pitches. He was replaced by left-hander Brian Flynn, who was called up by the Marlins Friday to provide depth to an already taxed pitching staff following Thursday night's 14-inning loss in Philadelphia.
In five starts for the Marlins including Friday's, DeSclafani has an ERA of 7.40. He is in line to take the loss as the Athletics now lead the Marlins 3-0 in the fourth inning.