Robert never went on tour with Ozzy because Jet Records' Don Arden, also Sharon's father, had hired a different guitarist, Bernie Torme, without telling anyone.
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Entertainment attorney Steven Machat, who was involved in the deal Osbourne signed with Jet Records, said in his 2011 book Gods, Gansters and Honour: A Rock 'n' Roll Odyssey that Osbourne's soon-to-be manager and wife Sharon Arden was not happy with the level of creative input Kerslake, Rhoads and Daisley had in the Blizzard of Ozz album and did not want them to share the credit.