Here's what head coach Mike Shanahan had to say about McNabb's injury:
"I don't think it's a bad ankle sprain. I don't think it's too bad. But it's still real sore right now, sore enough where he couldn't play this week if it was regular season, so that kind of gives you an idea."Teams typically play their starters the most in the third preseason game, so the injury hurts the offense in that regard. But McNabb should be ready for the first regular season game against the Cowboys on September 12. The rest of the offense may lose the chance to become more familiar with McNabb and open things up a bit more for the rest of the preseason, but it's important to keep McNabb as healthy as possible. With McNabb out, Rex Grossman will get the start.
According to Shanahan, fullback Mike Sellers and wide receiver Malcolm Kelly will also miss Friday's game. Safety Kareem Moore will miss the game as well and is out 4-6 weeks with a sprained knee. Reed Doughty will get the start in his place.