Norman was hurt defending receiver Marvin Jones on a 57-yard pass play. Norman was beaten by a step, and as the ball arrived, he lunged forward and hit the ground hard. Norman had been dealing with a heavily sprained right wrist, which he reaggravated two weeks ago.
Norman had shut down Jones until that play -- the Detroit receiver had not even been targeted before that deep pass.
Norman is Washington's third key starter who has suffered a concussion this season. Tight end Jordan Reed missed a second straight game because of a concussion. Safety David Bruton went on injured reserve with a concussion earlier this season. Rookie backup linebacker Su'a Cravens returned Sunday after missing two games with a concussion.
This puts Norman's status for next week's game against the Cincinnati Bengals in London in jeopardy.