the group's songs. Frazier's departure from the trio in 1966 brought in replacement David Boise. After a final live release, Kobluk left; Denver and Boise replaced Kobluk with Michael Johnson (who would later go on as a solo artist to record "Bluer Than Blue" among other popular songs) and because of contractual requirements that prohibited using the "Mitchell" name after the last original member left became "Denver, Boise and Johnson". Shortly thereafter, however, the group disbanded in 1969. Later careers and reunions Mike Kobluk, Joe Frazier and David Boise later left the music industry; Chad Mitchell released a number of solo albums before retiring from music; Denver's time with the trio became the springboard to his successful solo career. Michael Johnson recorded more than 15 albums as a solo artist; he died at his Minneapolis home on July 25, 2017. Frazier became an Episcopal Church priest. The Mitchell/Kobluk/Frazier trio and John Denver reunited in 1987 for several concerts, some broadcast on PBS. These are the only recordings of all four members singing together. The Mitchell/Kobluk/Frazier trio reunited again in 2005 for a short program as part of a concert also featuring Tom Paxton and The Kingston Trio's current lineup in Minneapolis, Minnesota. Mitchell/Kobluk/Frazier reunited again for a one-night performance on October 6, 2007, in Spokane, home of their alma mater, and where Mitchell and Kobluk live about two blocks apart. They continue to tour with artists like Tom Paxton and performed for President Obama at a 40th anniversary celebration in Washington D.C. for Representative Dave Obey, who is a fan of the group. Concerts in 2009 were part of a 50th Anniversary tour that culminated with a benefit in Big Bear Lake, California, in December. Joe Frazier died in his sleep on March 28, 2014, at the age of 77. The trio of Chad Mitchell and Mike Kobluk augmented by group bassist Ron Greenstein performed their farewell concert on November 15, 2014, at the venue Bethesda Blues & Jazz in Bethesda, Maryland. Featured personnel Other featured musicians for the trio through the years included: Jim McGuinn (who later founded The Byrds and took the name Roger McGuinn): Guitar, banjo Paul Prestopino: Guitar, 12 string guitar, banjo, and mandolin. Bob Hefferan: Guitar Pete Soloway: Acoustic bass Dennis Collins: Guitar Vic Messer: Guitar Bill Lee: Bass Fred Hellerman: Guitar Erik Darling: Banjo Jacob Ander: Guitar Bruce Langhorne: Guitar Norman Keenan: Bass Clyde