Roberto Clemente was a Hall of Fame-bound supernova on the diamond and a peerless humanitarian off it. His name carries an impact wherever it goes, that it landed on this baseball in the form of his furiously scripted autograph is pure luck for anyone who nabs this treasure. Clemente wrote "Sinceremente, Roberto Clemente" and you better believe he meant it. He signed this EX Rawlings "Official League" sphere for a child in a San Juan Hospital - talk about strong medicine. As the years pass since a Dec. 31, 1972 airplane crash took his life at age 38, Clemente has morphed into mythical stature. Just mention his name and watch reverence light a fan's eyes; show them this bold (8-9/10) autograph, and there's no telling how they'll react.