Pedro Rizzo had a victory over what American mixed martial artist know for his success in the early years of UFC?
Pedro Rizzo: Pedro Augusto Rizzo (] ; born May 3, 1974) is a retired Brazilian mixed martial artist, kickboxer and Muay Thai fighter who competed for the UFC, PRIDE, M-1 Global, and Affliction. Pedro Rizzo:  Rizzo holds notable victories over former UFC champions Mark Coleman, Dan Severn, Josh Barnett, Andrei Arlovski, Ricco Rodriguez and Ken Shamrock.
i don't know