Clyde Drexler Autographed/Signed Pro Style Black Jersey JSA 43520 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 Black Jersey that was personally autographed by Clyde Drexler. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.