Pro Bowl kick returner Clifton Smith his second concussion of the year - both against Carolina - when he was knocked woozy six seconds into the game as a member of the kick coverage unit.
Smith was injured when Panthers T Geoff Schwartz fielded Barth's short kickoff and returned the ball 16 yards to the Carolina 36.
"I went in low and took a shot," said Smith, who remained prone on the field for several minutes. "I got a little concussion, but I felt a lot better as the game went on. It was nothing like the last time."