Robert Griffin III suffered a sprained right knee during the fourth quarter of the Washington Redskins' overtime win over the Baltimore Ravens.
Griffin's availability for next week is unclear, but an X-ray and MRI revealed no major damage to the knee, including major ligaments.
Griffin left the field for one play and returned for four more before dropping to the ground in pain.
"I still felt like I could go out and help the team win," Griffin said after the game. "I feel pretty good. I'll fight."