Adrian Martinez Signed Autographed Nebraska Cornhuskers Riddell Speed Replica Full Size Helmet with Go Big Red Inscription . This licensed Helmet has been signed by Adrian Martinez. The autograph has been certified authentic by JSA and comes with their authentication sticker and matching certificate of authenticity that can be verified online. This signed Helmet is a great gift idea for any Nebraska Cornhuskers fan or memorabilia collector. Check out other memorabilia at???SportsCollectibles.com.???Shop with confidence as all signatures are 100% authentic. Sports Collectibles backs this product with our 100% Money Back Guarantee. .