Keyshawn Johnson Autographed/Signed Pro Style Green XL Jersey JSA 28619 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is a custom pro style green XL jersey with sewn on name and numbers that was personally autographed by Keyshawn Johnson. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.