This game-used cap was used and personally hand-signed by Corey Kluber with the inscription "2017 Memorial Day Game Used." It has been obtained under the auspices of the MLB Authentication Program and can be verified by its numbered hologram at MLB.com. It also comes with an individual numbered, tamper-evident hologram from Fanatics Authentic. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud. Please note that this game-used bat may have imperfections caused by in-game play.