Sarzo has played with many well known heavy metal acts including Quiet Riot, Ozzy Osbourne, Whitesnake, Manic Eden, Dio and Blue Öyster Cult. He has been a professional recording and performing artist worldwide for over 20 years. As a member of Ozzy Osbourne’s band, from March 1981 to September 1982, Rudy toured the world in support of the “Blizzard of Ozz” and “Diary Of a Madman” records. His bass playing can be heard on Ozzy’s multimillion selling CD “Tribute” and “Speak of the Devil” CD and DVD. His recordings with all these artists combined have sold over 30 million copies.