Gregory Walter Graffin (born November 6, 1964) is an American punk rock singer-songwriter, multi-instrumentalist, college lecturer, 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.