Jason Dufner autographed memorabilia. Add this Jason Dufner Autographed The Memorial Tournament Logo Golf Ball to your signed memorabilia collection. This product has been authenticated by Sports Collectibles and comes with a Certificate of Authenticity and matching taper-evident hologram. All Sports Collectibles memorabilia is backed by our 100% Money Back Guarantee. Get your authentic Jason Dufner Autographed Golf Balls from Sports Collectibles Online. This bold Jason Dufner signature is authentic and can be an excellent addition to your man cave, home or office.