Instead of just sitting around, Delp appeared on a pair of projects led by Goudreau during the early '80s, including the guitarist's 1980 self-titled solo debut and Orion the Hunter's 1984 self-titled debut. 1986 saw Delp guest on Keith Emerson's solo outing Best Revenge, but more importantly, it also signaled Boston's return. With all the record company red tape sorted out, Boston was ready to issue their long-awaited third album, Third Stage (despite the fact that Delp and Scholz were the only members left in attendance from the '70s). The long wait didn't affect the album's chart performance, as Third Stage became another sizeable hit. But when another lengthy break between albums occurred, it was Delp's turn to jump ship, and he left Boston in 1990. A year later, Delp united once more with Goudreau, this time in a new band called RTZ, which issued the album Return to Zero the same year. With Boston finally readying a new release, Walk On, in 1994, Delp surprisingly rejoined the band for its ensuing tour, sharing vocal duties with newcomer Fran Cosmo.
With Boston on hiatus once more afterward, a second RTZ album, 1998's Lost, was issued, and it turned out to be a collection of leftover songs from the sessions for their debut seven years earlier rather than set of freshly recorded tracks. During the late '90s, Delp guested on the Lisa Guyer Band's Gypsy Girl, in addition to singing on a few new Boston tracks for inclusion on their 1997 Greatest Hits set (Delp also formed a Boston-area Beatles tribute band, jokingly named Beatle Juice). The early 21st century saw Delp return to the Boston fold, as Scholz was ready to assemble Boston's fifth studio album over a 27-year span. Sadly, the singer was found dead in his home in Atkinson, NH, on March 9, 2007, from what was later determined suicide. ~ Greg Prato, Rovi