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Former long time keyboard player for Black Sabbath, although he is actually a guitarist by trade. He played with the band from 1979 through 2004 and was frequent co-writer for Black Sabbath but was not always credited as a full member of the band and often performed off-stage at the band's concerts. Was a member of Quartz prior to joining Black Sabbath. After parting ways with Black Sabbath he continued to work with one-time Sabbath vocalist Tony Martin.