Fuzz (born Steve Kmak) is an American bass guitar player, best known for his work with the rock band Disturbed.

Fuzz founded Disturbed in 1996 with guitarist Dan Donegan and drummer Mike Wengren. They played small clubs in Chicago before singer David Draiman answered their ad. They then produced their first studio album The Sickness, released in 2000 and their second album Believe, released in 2002. Any friction between the members was invisible to the eyes of fans.

Fuzz was excused from the group for "personal differences" in 2003 after finishing the Music as a Weapon II Tour.[1] He was replaced with Matt Konopinski very briefly, and then John Moyer, who is the current bass player.

Fuzz was asked through a message on MySpace why he got kicked out of the band and replied with - "Its very simple. Dave (Draiman) treated everybody like shit. He treated his Daily bimbo better than he treated me. And friction grew. He wanted me out. Its that simple." Before being fired from the band, Fuzz told the members of the now defunct "Disturbed Message Board" that soon he would be a father of a girl. Fuzz never came back to the board to give a birthdate or a name.

He returned back to his MySpace page recently, stating that in January 2007 he and his wife had a second child. He is a boy, but no name was given.