It's unclear how long he'll be out of commission, but one would have to assume he'll miss some playing time. He was knocked unconscious by the hit, fumbling the ball. Although he was reportedly walking on the sidelines shortly after the hit, his head received multiple blows on the play including a violent crash into the ground without his helmet on.
Knowing what we now know about concussions, it would seem unlikely that the Browns will rush the eighth-year wide receiver out of Kent State back into play.
Cribbs had only four catches on the year, but was the team's primary kickoff and punt returner. He was replaced in those duties by Travis Benjamin.