Mike Alstott Autographed Pro Style White Jersey SB Champs Beckett 40308 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a custom pro style white XL jersey with sewn on name and numbers that was personally autographed by Mike Alstott. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.