Sean Rickman (born October 16, 1970) is an American drummer, vocalist, guitarist, bassist, songwriter, producer and recording artist from Washington, DC.He is best known for his work with Shawn Lane, Garaj Mahal, Dapp Theory, Steve Coleman, Maxwell, Meshell Ndegeocello, Blacksheep, Phil Upchurch, David Fiucynski & Screaming Headless Torsos, Kai Eckhardt, Anthony Tidd's Quite Sane, K'Alyn, Angela Bofill and George Duke.Rickman was lead singer and drummer for Garaj Mahal from 2007–2011 and currently his DC Rock band Big Mouth featuring guitarist Leonard Stevens.