Robert John Daisley (born 13 February 1950) is a retired Australian bass guitarist. He has collaborated on several occasions with Ozzy Osbourne, for whom he contributed bass, backing vocals, co-production and songwriting. He has also worked with prominent rock acts including Black Sabbath, Rainbow, Gary Moore, Chicken Shack and Uriah Heep, among others. Biography Early career Daisley began playing guitar at age 13 and went on to bass at 14. His rapid progress won him local acclaim especially through his work with guitarist Dennis Wilson with The Powerpact and Mecca; Mecca's only single release "Black Sally" became an underground hit and was covered by Human Instinct on their Stoned Guitar album. Daisley and Wilson then formed Kahvas Jute with Tamam Shud members Tim Gaze and Dannie Davidson. They released one album, Wide Open, on Infinity Records in 1971. Daisley came to international notice as a bass player and member of the English blues band Chicken Shack in 1972, before going on to play with Mungo Jerry in 1973 and on their 1974 album Long-Legged Woman Dressed in Black. After this he co-formed Widowmaker, contributing to two albums – 1975's self-titled debut and Too Late to Cry in 1977. The same year he joined Ritchie Blackmore's band Rainbow and later played on tracks of the Long Live Rock 'n' Roll album. He remained with Rainbow until 1979 when he was replaced by Blackmore's ex-Deep Purple bandmate Roger Glover. Ozzy Osbourne In October 1979, Daisley met Ozzy Osbourne at a venue called the Music Machine in Camden Town, and Osbourne soon suggested they form a band with former Quiet Riot guitarist Randy Rhoads, whom Osbourne had recently met in Los Angeles. The trio hired ex-Uriah Heep drummer Lee Kerslake and settled on the band name The Blizzard of Ozz, though a record company billed the act simply as "Ozzy Osbourne". Daisley contributed bass and backing vocals as well as songwriting and co-production on the group's first album, Blizzard of Ozz, and co-wrote all of the material on the follow-up album Diary of a Madman but both he and drummer Lee Kerslake were fired before the album was released. Rudy Sarzo and Tommy Aldridge appeared in their place in the artwork and credits of that album. Daisley and Kerslake successfully sued Jet Records and Don Arden in 1986 for performance royalties and to have their performance credits added to Diary of a Madman.