This Autographed White Nike Michael Jordan Jersey with the inscription of "Go Ducks!" has been Personally Signed by Phil Knight. This item is 100% Authentic and comes with a PSA/DNA Certification numbered Hologram. Please note that PSA/DNA no longer provides serial-numbered COA cards, and the attached PSA/DNA sticker will serve as the complete authentication for this item. The authenticity can be verified on Professional Sports Authenticators website. This is a X-Large sized Jersey.