[2] 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.
Byron remained for the promotional tour for the album Past to Present 1977–1990, 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.
[6] After briefly considering disbanding, Toto returned to touring, with Los Angeles-based British drummer Simon Phillips replacing Jeff Porcaro.
[12] Less than two years after the band's breakup, it was announced in February 2010 that Toto would be reforming for a run of shows in benefit of Mike Porcaro, who had been diagnosed with amyotrophic lateral sclerosis.
The new band lineup would feature bassist John Pierce (Huey Lewis and the News, Pablo Cruise, and a long-time session player), drummer Robert "Sput" Searight (Ghost-Note, Snarky Puppy), and keyboardists Dominique "Xavier" Taplin (Prince, Ghost-Note) and Steve Maggiora (Robert Jon & the Wreck), as well as long-time multi-instrumentalist Warren Ham.
In January 2024, Toto announced the return of keyboardist Greg Phillinganes and drummer Shannon Forrest ahead of their 2024 tour,[27] replacing Taplin and Searight respectively.