Robert Griffin III out for game with stinger, possible head injury

— -- LANDOVER, Md. -- Washington Redskins quarterback Robert Griffin III, under siege during limited action versus  Detroit on Thursday, exited early with a stinger and a possible head injury and was ruled out for the game.

Griffin was hit after almost every pass play during his one-plus quarters of action. On his final play, Griffin started to run, lost the ball on his own, then when he fell to recover it, Lions defensive lineman Corey Wootton fell on top of him. Griffin's right arm was extended, and Wootton fell on Griffin's head.

Griffin lay on the ground for several minutes before walking off under his own power and headed to the locker room with a glum look on his face. He gave a thumbs-up to the crowd.

Griffin struggled all night, but it was largely a function of poor pass protection. It didn't help that left tackle Trent Williams was sidelined; his replacement, Willie Smith, was beaten often. The Redskins also have two inexperienced blockers on the right side in rookie guard Brandon Scherff and second-year player Morgan Moses. Both had their issues Thursday.

Griffin, who said earlier in the week that he felt he was the best quarterback in the NFL -- and that he just had to prove it -- had a rough night. He completed two of five passes for eight yards and was sacked three times. But he was hit on six pass attempts, including on short drops in which he threw quickly.

Despite Griffin's injury, the Redskins improved to 2-0 in the preseason with a 21-17 victory.