Member:
NA- Quartz - keyboards  
NA- Cozy Powell - keyboards  
1979-2004 Black Sabbath - keyboards  
2005- Tony Martin - keyboards  
2006 Black Sabbath - keyboards  
Studio musician:
1980-1985 Black Sabbath - keyboards, bass  
1990-1992 Black Sabbath - keyboards  
Guest musician:
2004 Iommi - keyboards