Miami Marlins ace Sandy Alcantara felt forearm tightness after his rehab start with Triple-A Jacksonville on Thursday night, the team announced on Friday.
The reigning NL Cy Young Award winner had cruised through the start, fanning four over four scoreless innings before eventually feeling the tightness. Alcantara is now traveling back to Miami to be evaluated by the team.
Alcantara has been sidelined since Sept. 6 because of a right forearm flexor strain. He first felt discomfort while pitching against Washington on Sept. 3.
The Marlins ace was working his way back in the hopes of rejoining the team amidst a tight NL wild-card race.