By early 1971 , with Christine Perfect becoming an official member of the band , Fleetwood and the group boarded a plane to San Francisco . Spencer , fearful following the recent 1971 San Fernando earthquake , reluctantly boarded the plane . Having arrived in America , he grew more disillusioned with the group , and unsuccessfully pleaded with Fleetwood to cancel this leg of the tour . He left the hotel abruptly one afternoon and disappeared . He was found several days later to have joined Family International , then known as Children of God , a religious group started in 1968 in Huntington Beach , California . Once more , Fleetwood attempted to mediate ; however Spencer would not return . After Green was asked to return temporarily to help finish the tour , the band met with Bob Welch who would become their next member . Their next album , '' Future Games '' , was released later that year . '' Bare Trees '' came a year later , in 1972 . During the subsequent tours to promote the latter , Fleetwood once more adopted the role of mediator : Kirwan 's self-destructive personality and problems with alcohol culminated in a refusal to go on stage before one concert ; Fleetwood himself made the decision to fire the band member . Furthermore , there were early signs of strife in the marriage of John and Christine McVie . Fleetwood again stepped in to mediate between the two members , talking Christine out of a decision to leave the group . The band added guitarist Bob Weston and vocalist Dave Walker , formerly of Savoy Brown and Idle Race . The resulting turmoil , however , negatively affected their next album , '' Penguin '' , released in 1973 to poor reviews . Walker was subsequently asked to leave the group , and the next album '' Mystery to Me '' was received more warmly
1971 San Fernando earthquake
1971 San Fernando earthquake
Mick Fleetwood