Carter passed his concussion protocol Thursday, and will return to the game, Jeff Zrebiec of the Baltimore Sun reports.

EDGE Analysis

Carter originally appeared shaken up, and went with the trainers to undergo concussion tests. He has apparently passed them as he is back on the sideline with his helmet on. The 27-year-old figures to add depth to the Ravens linebacker corps this season.

Williams left Thursday's preseason opener to undergo concussion protocol.

EDGE Analysis

The sixth year Fresno State product currently projects as the third strongside linebacker on the Ravens depth chart. If he did indeed suffer a concussion, don't expect him back on the field until all of his symptoms have passed.

Steelers placed LB Chris Carter (abdominal) on injured reserve, ending his season. Carter is James Harrison's backup. He started the first three games of the year, recording six tackles and no sacks during those contests. Since then, the 2011 fifth-round pick has been a special teamer. The Steelers promoted LB Marshall McFadden from the practice squad to fill Carter's roster spot.