Full Size Riddell Replica AMP Helmet hand signed by Minnesota Vikings Linebacker CHAD GREENWAY. The signature is in White paint pen and includes the inscriptions "2006 1st Rnd Pick & 2 x Pro Bowl". This item was signed at a public signing and would make a great addition to any Vikings collection! This item is guaranteed to be 100% authentic and will include a COA from JSA (James Spence Authentication) with matching serial numbers.