band members ; original lineup randy california - guitar , vocals ( 1967 -- 72 , 1974 -- 79 , 1982 -- 97 ) ed cassidy - drum ( 1967 -- 72 , 1974 -- 79 , 1982 -- 97 ) john locke - keyboard ( 1967 -- 72 , 1976 , 1982 -- 85 , 1988 -- 89 ) mark andes - bass ( 1967 -- 71 , 1974 , 1976 , 1982 -- 85 , 1988 -- 89 ) jay ferguson - vocals , percussion ( 1967 -- 71 , 1976 , 1982 -- 85 ) ; later members following sardonicus , many musicians passed through the group 's ranks .