This Autographed Game Used Arizona League Baseball has been Personally Signed by Mariano Rivera of the New York Yankees. This item is 100% Authentic to include a hologram by Beckett Authentication Services. This item will come with an affixed Beckett Authentication Services (BAS) authentication sticker, which includes a scannable QR code to verify authenticity. Please note that Beckett no longer provides serial-numbered COA cards, and the attached BAS sticker will serve as the complete authentication for this item. The authenticity can be verified on Beckett Authentication Services website. This baseball's game use is not authenticated, but it is consistent with known exemplars from this era of play.