Matt Schieferstein seen here relaxing on a "sweet gig", the American Idol Tour, where things don´t move quite as fast as a normal rock n´roll gig. Normally Maddi or "Sarge" as he´s sometimes known is the backbone behind bands such as Deep Purple, where he looks after bass player Roger Glover. Maddi´s other clients include John Petrucci, Pat Travers, and Ronnie James Dio.