Vlad Guerrero Jr. Autographed/Signed Pro Style White Jersey JSA 43336 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 Pro Style White Jersey that was personally autographed by Vlad Guerrero Jr. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.