 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.