Football star Rob Gronkowski has personally hand-signed this New England Patriots Authentic Full Size Helmet. Nicknamed Gronk Gronkowski has been one of the most prolific tight ends in NFL history. In 2011 Gronkowski in just his second season in the NFL set the single-season record for touchdowns by a tight end with 17 receiving touchdowns and 18 overall. In so doing he became the first tight end in NFL history to lead the league in receiving touchdowns. In his first three seasons he has 38 receiving touchdowns in 43 games; no other tight end has had more than 25. In Super Bowl XLIX Gronkowski contributed in a major way in scoring a touchdown in the second quarter to help the New England Patriots defeat the Seattle Seahawks. This Rob Gronkowski autograph is Guaranteed Authentic by Steiner Sports and include a Steiner Sports Certificate of Authenticity and an accompanying tamper-proof Steiner Hologram. The Steiner Seal Means Its Real.