Thomas has been ruled out of Sunday's game at Las Vegas due to an ankle injury.
At the end of an Antonio Gibson eight-yard run in the fourth quarter, Thomas was seen laying on the turf and clutching at his knee. Thomas proceeded to walk slowly to the sideline with a member of Washington's training staff and quickly was deemed unable to return. He'll finish Week 13 with three catches (on five targets) for 48 yards and one touchdown.