Redskins coach Mike Shanahan said team orthopedic physician Chris Annunziata told him that Griffin's knee was "fine, little bit sore right now. That's about it."
Griffin left the game late in the fourth quarter after a hit from Denver defensive lineman Terrance Knighton. Griffin's left knee got caught in the ground and the 335-pound Knighton fell on top of it after the hit. Griffin grabbed his knee while on the ground.
"I think it just scared me," he said.
Backup Kirk Cousins played the rest of the game. The Redskins trailed by 17 at that point, which is why Shanahan did not put Griffin back in the game.
"We made a decision that I was fine and that I could go back in the game," Griffin said. "We all made the decision that it was just time to keep me out."