The Redskins are concerned Norman suffered a a possible internal injury, a source informed of the situation told NFL Network Insider Ian Rapoport. They are particularly concerned he is dealing with a possible lung issue, Rapoport added.
"That's the first time that's ever happened to where I couldn't get out there," Norman said, via ESPN. "I just have to take my time and have faith.
"I wanted to go out there, but do I more help the team or hurt the team if I can't really run and breathe hard?"
Gruden said Norman will continue to be evaluated and didn't say after the game what the timeline for Norman's recovery could be.