O'Hoppe (head) is not in the Angels' starting lineup against the Red Sox on Saturday.
O'Hoppe sustained a head injury during Friday's loss to Boston, when he took a foul tip to the mask in the third inning, though it looks like he'll avoid a stint on the 7-day concussion list, per Rhett Bollinger of MLB.com. Tyler Heineman will serve as the Angels' catcher and bat fifth while forming a battery with southpaw Sam Aldegheri.