Tim Robert Commerford ( born February 26 , 1968 in Irvine , California ) , also known by his various monikers/stage names ( Timmy C. , Y. tim K. , Simmering T , Tim Bob , and tim.com ) is the Bassist/backing vocalist for American rock band Rage Against The Machine and the now-defunct Audioslave.
Tim Commerford is a Grammy Award-winning bassist and vocalist .