List of Toto band members  Toto is an American rock band from Los Angeles, California. Formed in 1977, the group's original lineup included lead vocalist Bobby Kimball, guitarist and vocalist Steve Lukather, keyboardist and vocalist David Paich, bassist David Hungate, keyboardist Steve Porcaro and drummer Jeff Porcaro. The current lineup features constant members Lukather and Paich, original member Steve Porcaro (who rejoined in 2010, after leaving in 1987), and lead vocalist Joseph Williams (who originally joined in 1986, and rejoined in 2010). The band also tours with several additional musicians, currently bassist Shem von Schroeck (since 2017), drummer Shannon Forrest (since 2014), percussionist Lenny Castro (since 2015, and originally from 1979 to 1987) and saxophonist Warren Ham (since 2017, and originally from 1986 to 1988). Toto was formed in 1977 by vocalist Bobby Kimball, guitarist and vocalist Steve Lukather, keyboardist and vocalist David Paich, bassist David Hungate, keyboardist Steve Porcaro and drummer Jeff Porcaro. Hungate left after the recording of the band's fourth album "Toto IV" in 1982, with Mike Porcaro (brother of Steve and Jeff) taking his place. Kimball left two years later, with Lukather crediting his dismissal to increasing vocal problems stemming from his cocaine use. He was replaced by Dennis "Fergie" Frederiksen, who performed on "Isolation" befortitle=Interview: Steve Lukather Recounts 35 Years of Toto History |last=Giles |first=Jeff |work=Ultimate Classic Rock |publisher=Loudwire |date=October 18, 2013 |accessdate=December 30, 2017 }} Byron remained for the album's promotional tour, but did not get on with the rest of the band and left shortly thereafter, with no new frontman brought in to take his place. The band's constant drummer Jeff Porcaro died of a heart attack on August 5, 1992, later revealed to be caused by "hardening of the arteries" due to cocaine use. After briefly considering disbanding, Toto later replaced Porcaro with Simon Phillips and returned to touring. The group continued as a four-piece throughout much of the 1990s, before reuniting with Kimball, Williams and Steve Porcaro in 1998 for a tour in promotion of the 20th anniversary compilation "Toto XX: 1977–1997".