Johnny Manziel has been placed in concussion protocol, effectively ending his second NFL season.
The Browns quarterback reported to the team's facility on Wednesday complaining of concussion-like symptoms. He was sent to see a doctor for evaluation and the team announced following practice that he has entered into the league's program for head injuries.
Because it typically takes several days for symptoms to subside, it's highly unlikely Manziel will be cleared in time to play in Sunday's season finale against the Pittsburgh Steelers.
With Manziel out, backup Austin Davis will start against the Steelers.
Manziel took several hard hits while rushing for 108 yards in Sunday's 17-13 loss to Kansas City. The Browns may sign another quarterback and former Oakland quarterback Terrelle Pryor, who converted to wide receiver this season, took snaps during practice.