Mariano Rivera Autographed Rawlings OML 99 WS Baseball W/ 99 WS MVP- JSA Auth This is a Mariano Rivera hand autographed Rawlings Official Game Ball Major League Baseball. This item has a James Spence Authentication; which comes with a JSA numbered sticker and a matching JSA Certificate of Authenticity. You can view this item on the SpenceLOA website. It was signed either at a public autograph appearance or a private signing. This is a stock photo of the item. Although you may not receive this exact item; the item you receive is virtually identical; brand new; and in great shape.