Greg Graffin
 Gregory Walter Graffin Ph.D. (born November 6 1964) is an American punk rock musician college professor and author. He is most recognized as the lead vocalist songwriter and only constant member of the noted Los Angeles band Bad Religion which he co-founded in 1979. He also embarked on a solo career in 1997 when he released the album American Lesion. His follow-up album Cold as the Clay was released nine years later. Graffin obtained his Ph.D.