A Miami Dolphins Speed Authentic Camo NFL Helmet hand signed by Mark Clayton, Mark "Super" Duper & Dan Marino. The item and signature are in excellent condition. Mark Clayton was a wide receiver for the Mimi Dolphins and a 5x Pro Bowler. Mark Mark Duper Nicknamed "Super Duper" was a wide receiver for the Miami Dolphins and a 3x Pro Bowler, Dan is a former quarterback who played in the NFL for 17 seasons with the Miami Dolphins. After a successful college career at Pittsburgh and being named First-team All-American in 1981. AUTHENTICATION: This item is accompanied by a JSA Certificate of Authenticity - JSA Serial Numbered and Databased Hologram