Description:Khalil Mack autographed Salute To Service game used football. Wilson "The Duke" NFL football used during the 11/6/2016 game between the Broncos vs. Raiders. Mack signed the ball in black marker. Includes NFL Auctions COA from PSA/DNA, with matching serial #ed sticker affixed to the ball. Mack recorded 2-sacks in the game. The ball shows light use, with scattered surface wear, and official markings in silver paint pen below the Raiders logo: EX/MT