Steven Maxwell Porcaro (born September 2, 1957) is an American keyboardist, songwriter and original member of the rock band Toto. He is also the sole surviving Porcaro brother with his brothers Jeff and Mike having died in 1992 and 2015 respectively. Just like his brothers Jeff and Mike, Steve Porcaro started out as a drummer under the tutelage of his father Joe Porcaro, before taking up piano. Porcaro's touring career began playing with Gary Wright during his tour in 1977, supporting the latter's The Dream Weaver album. Porcaro and the other original members of Toto then played with Boz Scaggs before forming Toto. Porcaro wrote or co-wrote at least one song on each of Toto's first six albums, with the exception of Isolation. His two older brothers Mike and Jeff were Toto's bassist and drummer as well as session musicians while his father Joe is a prolific session percussionist. Unlike most of his Toto bandmates, he generally did not contribute lead or even backing vocals; he considered himself a weak singer, and sang lead on two of his earlier compositions only because he felt that the vocal styles of his bandmates, with the exception of Joseph Williams, were not appropriate for his songs. The song "Rosanna" was inspired by Porcaro's girlfriend at the time, Rosanna Arquette. He left Toto in 1987 after the Fahrenheit album in order to pursue a more full-time songwriting and composing career. However, Porcaro continued working with Toto in various supporting capacities, assisting with keyboards, drum looping, synthesizers and arranging/composing. Porcaro composed the music for the song "Human Nature" and produced the synthesizer for "The Girl Is Mine" from Michael Jackson's album Thriller as well as playing synthesizer and keyboard on "Stranger in Moscow" from Jackson's HIStory album. Porcaro returned to play with Toto at live performances since 2010, when they decided to reform the band and tour in Europe to support Mike Porcaro. They scheduled further concerts in Europe. Porcaro performed on the band's 2015 studio album Toto XIV, co-writing and singing lead on 'The Little Things' and writing/singing lead on the Japan-only bonus cut, "Bend."

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