Fermin was removed from Wednesday's game against the Mariners with an apparent injury, Jeff Sanders of The San Diego Union-Tribune reports.
Fermin was immediately pulled from the game after taking a Brendan Donovan foul tip off his mask in the third inning. He'll presumably be evaluated for a concussion. Meanwhile, Luis Campusano will take over behind the plate and should handle the starting job if Fermin misses any time.