JJ Watt Autographed/Signed Houston Texans F/S AMP Helmet JSA 28993 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is a Houston Texans full size AMP replica helmet that was personally autographed by JJ Watt. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.