Porter left the Doobies in 1980, citing frustration with the hectic and constant touring schedule. His replacement was session man Willie Weeks, later famous for his collaboration with Michael Jackson and other Quincy Jones protégés. After guesting onstage with his former bandmates briefly during the 1982 farewell tour, he rejoined the Doobies in 1987. Porter played on Cycles (1989), whose title was taken from an unused song he wrote, and Brotherhood (1991). Neither album featured a Porter composition or lead vocal, and his bass is often buried in the mix. After five years of touring in support of Cycles and Brotherhood, Porter finally quit the Doobies for good in 1992. He was reportedly still frustrated with constant touring and the band's preference for recording familiar sounding material instead of his own, more diverse compositions.