MIAMI -- Double-A Jacksonville left-hander Dillon Peters, one of the Marlins' top pitching prospects, fractured his left thumb on Monday night in a 3-1 loss to Pensacola.
Ranked by MLBPipeline.com as Miami's No. 5 prospect, Peters was struck by a comebacker and exited after 1 2/3 innings.
It's unclear how long Peters will be out, but it is a tough blow for the 24-year-old, who boasts a 94 mph fastball to go along with a plus breaking ball.
Peters impressed the Marlins with a strong Spring Training, and he is 2-1 with a 2.25 ERA and 13 strikeouts in 12 innings for Jacksonville. His pitching likely would have made him a candidate to be called up in the first half of the season.
Peters made his third start on Monday, and he gave up two runs (one earned) while recording two strikeouts. He was tagged with the loss.
Miami selected Peters in the 10th round from the University of Texas of the 2014 Draft, and he has a career Minor League record of 17-11 with a 2.67 ERA.