Warren was previously a member of bands Karp, Tight Bros from Way Back When, White Shit, and The Whip. He also contributed vocals to the song "Breaking Rocks" on the album Forging Steel and Laying Stone by Akimbo.
Prior to his solo career, Warren was part of several musical groups: Karp, Tight Bros from Way Back When, White Shit, and The Whip.  He also contributed vocals to the song "Breaking Rocks" on the album "Forging Steel and Laying Stone" by Akimbo.