Landover, Md. — Detroit Lions cornerback Terrion Arnold suffered a concussion in the first half of Sunday's game against the Washington Commanders.

It's unclear when Arnold was injured, but the second-year pro was spotted walking to the locker room right before halftime. Without Arnold, the Lions turned to Rock Ya-Sin on the outside, opposite Amik Robertson, who started the contest.

Offensive linemen Penei Sewell (leg) and Graham Glasgow (back) were banged up in the first half, but both players returned to the field. Sewell went to the medical tent and missed only a handful of offensive snaps. Glasgow, meanwhile, avoided the tent. He was tended to by trainers on the sideline and made his way to the locker room with a couple minutes remaining in the second quarter.

Glasgow returned

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