A Green Bay Packers Speed Custom NFL Mini Helmet hand signed by Clay Matthews. The item and signature are in excellent condition. Clay is a former outside linebacker who played for the Green Bay Packers. He is a Super Bowl Champion, 6x Pro Bowler & a Butkus Award winner. AUTHENTICATION: The item is accompanied by a Certificate of Authenticity – Serial Numbered & Databased Hologram – Picture of Chris from the signing.