Mark Walton Signed Autographed Wilson Supergrip Football. This licensed Football has been signed by Mark Walton. This autograph has been certified authentic by JSA and comes with their authentication sticker and matching certificate of authenticity that can be verified online. JSA is a leading third-party authenticator in the autograph industry. This signed Football is a great gift idea for any Miami Hurricanes fan or memorabilia collector. Check out other memorabilia at Prime One Sports.com. Shop with confidence as all signatures are 100% authentic. Prime One Sports backs this product with our 100% Money Back Guarantee. .