O.J. Simpson Autographed/Signed Pro Style White XL Jersey HOF JSA 26421 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 white XL jersey with sewn on name and numbers that was personally autographed by O.J. Simpson with HOF inscription. Includes a certificate of authenticity from James Spence Authentication (JSA)