This Odell Beckham Jr. And Baker Mayfield Cleveland Browns Autographed Riddell Full Size Speed Replica Helmet - JSA and Beckett Authentic comes with a Certificate of Authenticity from JSA. The product has been personally hand-signed by Baker Mayfield. Prime One Sports is an online leader in authentic Baker Mayfield signed memorabilia. Add a unique signature to your Cleveland Browns Collectible collection. Order ships out within 1-2 business days.