Fleetwood Mac did not gain huge international acclaim until 1975, but in its early years released some really good albums. One contributor to those passed away Friday. Danny Kirwan was just 17 when he was opening club shows for Fleetwood Mac as the guitar player in the band Boilerhouse. He impressed the headliners enough to be asked to join FM in 1968.  He was a member during the years the band produced Then Play On, Kiln House, Future Games and Bare Trees. Kirwan was fired after refusing to take the stage with the band at a concert during its US tour in the fall of 1972.