Rodolfo Maximiliano Sarzo Lavieille Grande Ruiz Payret y Chaumont[1] (born November 18, 1950) is a Cuban-American hard rock/heavy metal bassist.

He remains best known for his work with Quiet Riot, Ozzy Osbourne, and Whitesnake, and has also played with several well known heavy metal and hard rock acts including Manic Eden, Dio, Blue Öyster Cult, Geoff Tate's Queensrÿche, Devil City Angels, and the Guess Who.

The pair became quite close, and grew disillusioned with Quiet Riot's inability to land an American recording contract, as their albums had been released in Japan only at that point.

With Quiet Riot officially disbanded, Sarzo joined a band called Private Army with drummer and friend Frankie Banali.

The liner notes of Osbourne's 1981 studio album Diary of a Madman list Sarzo as the bassist, though Bob Daisley actually played bass on the recordings.

In stark contrast to the chaos surrounding everyday life on the road with the hard-drinking Osbourne, the experience was so positive that Sarzo ended up recording most of the Metal Health album with his former band and he made the decision to officially rejoin Quiet Riot once the Diary of a Madman tour had concluded.

[5] Sarzo was a member of Quiet Riot during the peak of the band's success, and he appeared in numerous MTV videos and was voted 1983's Top Bassist by the readers of Circus magazine.

From April 1987 to September 1994, both Sarzo and Aldridge were members of Whitesnake before lead singer David Coverdale put the band on indefinite hiatus.

[11] Other members of Tate's version of the band included guitarist Kelly Gray, drummer Simon Wright, and keyboardist Randy Gane.

Based upon detailed daily journal entries Sarzo kept during his time in the band, the book focused on his memories of guitarist Randy Rhoads who died in a 1982 plane crash during the Diary of a Madman American tour.