In 1972, Santana had been increasingly influenced by the music of Miles Davis, John Coltrane, and Joe Zawinul, who had explored jazz fusion by this time. The fourth album, "Caravanserai" (1972), marked a number of line-up changes; bassist David Brown left in 1971 before recording started and was replaced by Doug Rauch and Tom Rutley. Carabello was replaced with two percussionists, Armando Peraza and Mingo Lewis. Rolie was replaced by Tom Coster on a few songs. "Caravanserai" debuted at number 8 on the pop charts, despite not spawning a hit single.