Browns wide receiver Jordan Norwood sustained a concussion on Sunday, at least the 11th reported head injury for Cleveland this season.
Norwood had three catches for 21 yards during the Browns' 20-17 overtime loss to Arizona. Coach Pat Shurmur says Norwood is day to day.
Reserve linebacker Ben Jacobs also suffered a concussion.
Shurmur says linebacker Titus Brown suffered a "significant knee injury" and will likely miss the final two games. Tight end Alex Smith also sustained a "significant" shoulder sprain.
With Benjamin Watson on injured reserve with a concussion, the Browns are down to just Evan Moore and rookie Jordan Cameron at tight end. Shurmur said Monday the Browns will be making roster moves in preparation of Saturday's game at Baltimore.