Dallas Cowboys rookie cornerback Morris Claiborne is not expected to play Sunday against the Pittsburgh Steelers.
Claiborne did not pass a concussion test as of Saturday, according to NFL.com. He cannot be cleared to play until he meets the NFL's protocol for concussions.
Claiborne sustained a concussion and a bloody lip that required 10 stitches after inadvertently taking a hit from teammate Danny McCray against the Cincinnati Bengals last Sunday.
If Claiborne does not play, Mike Jenkins will likely replace him.
Claiborne said he felt better Friday after feeling dizzy on Thursday.