Timothy Robert Commerford (born February 26, 1968) is an American musician, best known as the bassist and backing vocalist for the American rap metal band Rage Against the Machine (1991–2000; 2007–2011) and the now-defunct supergroup Audioslave (2001–2007). Since 2013 and 2015, he has been the lead singer and bassist of the bands Future User and Wakrat, respectively.