The Pittsburgh Steelers’ run at perfection is over.
Washington rallied from a 14-point deficit to stun Pittsburgh 23-17 to drop the Steelers to 11-1 on the season.
Washington quarterback Alex Smith passed for 296 yards and a 15-yard touchdown to Logan Thomas in the fourth quarter that tied the game.
Dustin Hopkins kicked a field goal with just over 2 minutes left to put Washington ahead to stay.
Pittsburgh missed a chance to clinch a playoff berth with the loss.
Washington won its third straight and stayed tied with the New York Giants for the top spot in the NFC East at 5-7.