Ravens wide receiver Mike Wallace walked from one end of the sideline to the other, pleading his case first to members of the team’s medical and athletic training staff, then to coach John Harbaugh and then to anybody within earshot who would listen.
He frantically searched for his helmet, even swinging open some equipment cases. But no matter how hard he looked and how much he talked, his afternoon was over.
“That was a done deal,” Harbaugh said.
Playing against one of his old teams after a week in which he barely practiced because of a back injury, Wallace was knocked out of the game and into concussion protocol on the Ravens’ second drive, courtesy of a high and...