Dallas Cowboys linebacker Sean Lee is out for the rest of the game against the New Orleans Saints with a concussion.
The linebacker was taken to the locker room to undergo concussion protocol in the second quarter.
Lee was attempting to make a tackle on tight end Ben Watson when he suffered the injury.
It is another injury blow for Lee - who is one of the league's best linebackers - in his struggles to remain healthy.
He had three tackles before being forced out of the game.