Jamal Anderson Autographed/Signed Pro Style Black XL Jersey Beckett BAS 33971 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 black XL jersey with sewn on name and numbers that was personally autographed by Jamal Anderson. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.