Clay Matthews Autographed Green Bay Packers 16x20 Stance Photo - JSA W *White This is a hand autographed 16x20 Highland Mint Photo of Clay Matthews of the Green Bay Packers. This item has a James Spence Witness Authentication, which comes with a JSA numbered sticker and a JSA Certificate of Authenticity. You can view this item on the SpenceLOA website and it shows when and where the item was signed. It was signed either at a public autograph appearance or a private signing. This is a stock photo of the item. Although you may not receive this exact item, the item you receive is virtually identical and brand new in great shape.