Randolpho Francisco Castillo (December 18, 1950 – March 26, 2002) was an American heavy metal/hard rock drummer who is best known as Ozzy Osbourne's drummer from the mid 1980's to the early 1990's, and later as the drummer for glam metal band Mötley Crüe during the late 90's until his death from mouth cancer in 2002. He also worked with Lita Ford and Brett Michaels during his career, among others.