Walker departed with 10:34 left in the third quarter. The Browns ruled him out a short time later.
Walker took a blow to the face from Pittsburgh Steelers tackle Chukwuma Okorafor during a passing play and fell awkwardly to the turf. Okorafor then dove on the back of Walker while guard James Daniels inadvertently stepped on Walker’s legs.
Walker was the second Cleveland linebacker to be injured in the third quarter. Jeremiah Owusu-Koramoah departed with a quadriceps injury, and the Browns listed him as questionable to return.
Cleveland defensive tackle Taven Bryan (hamstring) also was questionable to return.