This Autographed Yellow Nike Size 44 +4 Length Game Issued Jersey has been Personally Signed by Marcus Mariota of the Oregon Ducks. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website. The jersey does not have a COA for being game issued, however with correct tagging lead us to believe these are in fact game issued. We offer autographed memorabilia only from the top, reputable, leading suppliers of authentic sports memorabilia. The companies that authenticate these items include Professional Sports Authenticator (PSA/DNA), James Spence Authentication (JSA), Steiner Sports, Upper Deck, Mounted ...