Rudy Sarzo is a Cuban American bassist. He was a member of Blue Öyster Cult. Sarzo has also played with Ozzy Osbourne, Devil City Angels, Dio, Dio Disciples, Geoff Tate's Queensrÿche, The Guess Who and Whitesnake. He re-joined Quiet Riot in 2021 and has performed songs with Tony Iommi, Joe Lynn Turner, Simon Wright and Carlos Cavazo. These include God Rest Ye Merry Gentlemen with Tony Iommi and Dio Disciples.