Washington Redskins quarterback Robert Griffin III left the game late in the fourth quarter of the Redskins' 31-28 overtime victory over the Baltimore Ravens.
"It's sore right now but he wanted to go back into the game, which is a good sign. It's a positive," said Redskins coach Mike Shanahan.
Griffin took a hit to the right knee from defensive tackle Haloti Ngata with under two minutes remaining in the game. He left the game for one play, then returned for four plays completing two passes before leaving again for good.
Griffin left the field while the Redskins were on a crucial drive, trailing 20-28. Kirk Cousins replaced Griffin, throwing an 11-yard touchdown pass to Pierre Garcon, and then running for the two-point conversion the next play to tie the game 28-28.
Redskins' Kai Forbath kicked a 34-yard game-winning field goal with 11:47 seconds remaining in overtime.
Griffin finished the game with 246 yards passing and one touchdown while running back Alfred Morris ran for 122 yards and one touchdown.
The Redskins (7-6) play at the Cleveland Browns (5-8) Dec. 9.