Signatures on this hat include: Don Shula "HOF 97" , Bob Griese "HOF 90" , Jim Kiick "17-0" , Marlin Briscoe "17-0" , Larry Little "HOF 97" , Gary Yepremian , Bob Kuechenberg , Nick Buoniconti "HOF 01" , Floyd Mumphord , Earl Morrall "QB" & Jim Langer "HOF 87. This item was hand signed by the athletes and is accompanied by a Certificate of Authenticity from Palm Beach Autographs. A tamper-evident hologram will be affixed to the item. Signed items are guaranteed to pass any third-party authentication with 100% Money Back Guarantee. Each signature is witnessed by a member of our staff or comes out of a private signing.