Prior to joining Def Leppard in February 1992 after Steve Clark died the previous year in January, he had been a member of Whitesnake, Sweet Savage, Trinity, Riverdogs, and Shadow King.
До прихода в группу в апреле 1992 он был членом ирландской рок-группы Sweet Savage, и других групп, в том числе Dio, Trinity, Whitesnake, Riverdogs, Shadow King, Thin Lizzy.