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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.
‘‘We’re happy that we won, obviously,’’ left tackle Trent Williams said. ‘‘But that is concerning, knowing he went down. Everyone wants to know how he’s doing.’’
Griffin went down during Washington’s final drive of regulation Sunday, with the Redskins trailing by 8. 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 left, then ran the quarterback draw for the 2-point conversion to tie the game.
Yet another rookie, Richard Crawford, returned a punt 64 yards in overtime to set up Kai Forbath’s 34-yard winning field goal. The Redskins (7-6) have a four-game winning streak — remaining one game behind the Giants in the race for the NFC East title — but the day’s most important result was still to come. About three hours after the game ended, the Redskins said an MRI exam showed no major ligament damage.
The worst-case scenario would have been a season-ending ACL tear, like the one Griffin had on the same knee while playing for Baylor in 2009. But team spokesman Tony Wyllie said the MRI showed ‘‘everything is clear” and ruled out that sort of significant injury.
‘‘I’m not a doctor, but I know what an ACL feels like,’’ Griffin said before being tested. ‘‘And it doesn’t feel like an ACL. . . . If I felt that, I’d be pretty nervous.’’
With the Redskins trailing, 28-20, after Ray Rice’s 7-yard touchdown run with 4:47 to play, Griffin started moving his team before he was tackled by Haloti Ngata at the end of a 13-yard scramble.
‘‘I knew as soon as I got hit. I screamed. Like a man, of course,’’ Griffin added with a laugh. ‘‘It hurt really bad.’’
Griffin left for one play, then returned for four more, completing two passes. But he was also hopping on one leg. Eventually, he fell to the turf and could no longer continue.
In came fourth-round pick Cousins, who was a clutch 2 for 2 — back-to-back to Leonard Hankerson for 15 yards and 11 yards to Garcon.
‘‘He’s ice. Like they used to say about Larry Bird, he got ice water in his veins. That’s the best thing you can say about Kirk,’’ receiver Joshua Morgan said.
The Ravens got the ball to start overtime but went three and out. Seventh-round pick Crawford had the big return to Baltimore’s 24-yard line, putting the Redskins easily within the range of Forbath, who hasn’t missed in 14 attempts in his debut NFL season.
The Ravens (9-4) would have clinched the AFC North with a win. Instead, they dropped back-to-back games for the first time since 2009.