In the third quarter of Thursday night’s Bills-Dolphins game, Miami quarterback Tua Tagovailoa suffered a concussion-at least his third in the last two calendar years-and left the game. The injury happened on a fourth-and-4 play with five minutes to go in the quarter. Tagovailoa stepped up in the pocket and scrambled for a first down, but as he went to the ground, his head collided with, of all people, Bills safety Damar Hamlin, and then slammed backward into the turf.