New biography claims guitarist turned down hellraiser following his sacking from Black Sabbath for drink and drug binges Gary Moore Ozzy Osbourne once asked Gary Moore to join his group — and “slagged him off” in the newspapers after he turned him down, according to a new biography of the former Thin Lizzy musician. Osbourne’s wife Sharon, who was to find fame as an X Factor judge, was a huge admirer of Moore and thought he would be the perfect fit for a new group her husband was setting up after he was fired from Black Sabbath in 1979 for his drinking and drug taking..