He joined the soul band The Seven Souls in 1964, then moved to Paris, where he formed Head West in 1969. The trio recorded one single album and a single, but stay without success. In 1971 he was invited to join Fleetwood Mac. After several album recordings and tours, he left in Dec. 1974. Once again he formed a trio, called Paris (19) this time. Second try, two albums here. In 1976 he released his first solo album. For detail information see the excellent wikipedia story.