An Arizona Diamondbacks Rawlings Mach Pro MLB Helmet hand signed by Randy Johnson. The item and signature are in excellent condition. In addition to signing his name, Randy also inscribed "Big Unit" on the item. Randy is a 10x All Star, 2001 World Series Champion and 2001 World Series MVP. AUTHENTICATION: Your item is tagged with a SmarTag powered by Prova Technology, which gives you digital access to your items authentication records, which includes a proof picture from the signing.