O'Hoppe was removed from Friday's game against the Rangers with an apparent head injury, Jeff Fletcher of The Orange County Register reports.
The 26-year-old backstop was slow to his feet after he collided with Josh Jung on a play at the plate in the seventh inning. O'Hoppe remained in the game for his at-bat in the bottom of the frame but was replaced behind the dish when the Angels took the field for the eighth. He said after the game that he feels fine, per Fletcher, but the Angels will put him through concussion protocol as a precaution. Sebastian Rivero would take over as the Halos' primary catcher if O'Hoppe ends up needing a move to the injured list.