LANDOVER, Md. — Robert Griffin, III walked gingerly through the Washington Redskins locker room, his sprained right knee in a big black brace.

Teammates stood at their lockers, mixing the emotions of an improbable 31-28 overtime win over the Baltimore Ravens with the fear that their franchise player could be seriously hurt. Griffin went down during Washington’s final drive of regulation Sunday, with the Redskins trailing by eight.

Fellow rookie Kirk Cousins, who had played in only one other game this season, stepped in and hit Pierre Garcon for an 11-yard touchdown pass with 29 seconds remaining, then ran the quarterback draw for the 2-point conversion to tie the game.