The Padres placed Fermin (concussion) on the 7-day injured list Sunday.
Fermin won't be available for at least the Padres' next six games after he was diagnosed with a concussion following his early exit in the team's 9-3 win Saturday, when he was hit in the mask by a pitch prior to the sixth inning. San Diego called up Blake Hunt from Triple-A El Paso to provide another healthy body behind the plate behind Rodolfo Duran, who will handle catching duties in Sunday's series finale in Baltimore.