The Doobie Brothers formed in 1969, with members Tom Johnston (vocals, guitar), John Hartman (drums), and Dave Shogren (bass); Patrick Simmons (vocals, guitar) joined in 1970. Tiran Porter replaced Shogren, 1971; Michael Hossack (drums) joined in 1971, replaced in 1973 by Keith Knudsen. Jeff Baxter (guitar) joined in 1974; Michael McDonald (keyboards, vocals, songwriting) joined in 1975. The Doobie Brothers epitomized mainstream rock and roll throughout the 1970s with a string of platinum albums and top ten hits. Continue...