Kevin Slowey is headed to the disabled list after leaving Saturday's game with discomfort in his right forearm, Marlins manager Mike Redmond said.
"He was loosening up down there and his forearm kind of tightened up on him and he wasn't able to go," Redmond said. "Him being our long guy we had to make a move."
Slowey, who came out to warm up in the third when starter Tom Koehler was struggling, didn't record in an out for the first time in his career when he gave up three hits and three runs against the Rockies his last time out earlier this week.
Slowey spent the majority of this season in the Marlins' rotation, going 1-6 with a 4.21 ERA in 14 starts.