Starting left tackle Trent Williams has exited the Washington Redskins' game against the Cincinnati Bengals in the first quarter with an injured right knee.
The Redskins say his return Sunday is questionable.
Williams, the No. 4 overall pick in the 2010 draft, was hurt on Washington's second play from scrimmage. He covered his face with his hands while trainers examined him on the field. Williams walked over to the sideline, where he was looked at again. He eventually headed to the locker room and was not on the field for Washington's second possession.
Taking over at left tackle was Jordan Black, who was out of the NFL last year.