A Los Angeles Raiders Mitchell & Ness Authentic Black NFL Jersey hand signed by Bo Jackson. The item and signature are in excellent condition. Bo was named an All-Star in both baseball and football, and one of few to do so in two major sports. He is widely considered one of the greatest athletes of all time. AUTHENTICATION: The item has been tagged with a SmarTag powered by Prova Technology, which gives you digital access to the items authentication records, including a proof picture from the signing.