Robb Flynn (born Lawrence Matthew Cardine, adopted, July 19, 1968, Oakland, California) is best known as the lead vocalist and guitarist for the heavy metal band Machine Head. Flynn formed the band along with Adam Duce, Logan Mader and Tony Costanza after leaving Bay Area thrash band Vio-Lence. Flynn also formed the thrash metal band Forbidden (originally Forbidden Evil), while in his graduating year at American High School (Fremont, California).