Patrick Peterson injury: Cornerback could have concussion

The Arizona Cardinals, who have suffered injury after injury on defense, it seems, is dealing with another one against the Philadelphia Eagles. All-Pro cornerback Patrick Peterson exited the game in the first half to be evaluated for a concussion.

Peterson was defending Philadelphia receiver Jeremy Maclin when he made a catch. Rookie safety Deone Bucannon came in for a big hit. His helmet hit the helmet of Maclin, whose helmet hit Peterson's. Peterson was on the ground motionless after the hit.

He walked off the field on his own, but was escorted to the locker room to be evaluated for a concussion. His return has been ruled questionable.

He did not come back out with the team after halftime. It would be a surprise if he returns.

Jerraud Powers moves from the slot to Peterson's place on the field and Tyrann Mathieu is playing in the slot.

Arizona has one other cornerback on the active roster -- Justin Bethel.