Miami Dolphins quarterback Tua Tagovailoa left the field on a cart in the first quarter on Sunday and is questionable to return with a rib injury.
The second-year signal-caller took a hard shot from Buffalo Bills defensive end A.J. Epenesa while attempting to complete a pass on fourth down on Miami's second possession.
The training staff came out to assist Tagovailoa and helped him walk to the sideline, where he was later loaded onto a cart and taken to the locker room.
He completed 1 of 4 passes for 13 yards and was sacked twice before exiting.
Jacoby Brissett replaced Tagovailoa.
--Field Level Media