"I guess it's normal for working out every day, and you get some bumps and bruises here and there. And I guess [Hinch] just wants to be cautious of it and take it a day at a time and not really push it," said Fiers, who's battling with Joe Musgrove for the fifth spot in the rotation.
Martes, ranked as the No. 20 prospect overall by MLBPipeline.com, will pitch two or three innings against the Marlins, and he will be followed by Chris Devenski.