Russell Wilson nearly led the Denver Broncos to an incredible comeback victory against the Kansas City Chiefs on Sunday but left the game early with a concussion.

On 3rd-and-11 from the Chiefs’ 16-yard line, Wilson scrambled for a first down and was about 2 yards short of the end zone when he was tackled by safety Juan Thornhill. Wilson went down hard and appeared to be in a daze. He needed to be helped up by medical personnel.

He wouldn’t return to the game and the broadcast camera showed the veteran quarterback with a big knot in his head as he roamed the sideline.