Michael Joseph Porcaro was an American bass player known for his work with the rock band Toto. He retired from touring in 2007 as a result of being diagnosed with amyotrophic lateral sclerosis.

Toto IV is the fourth studio album by American rock band Toto, released on April 1, 1982, by Columbia Records. The album's lead single, "Rosanna", peaked at number 2 for five weeks on the Billboard Ho