At the risk of boring Chicken George, who knows this better than I do, I followed them on and off from the beginning.
Peter Green, Mick Fleetwood, and John McVie came from the Bluesbreakers. Circa 67. Green had replaced Eric Clapton.
Bob Brunning was briefly the original bass player even though the band is named for drummer Fleetwood and bassist McVie.
Brunning later played with Kim Simmonds and Savoy Brown.
Christine McVie married John and joined FM about 70.
Green, who was one of the best blues rock guitarists back then, had issues and was more or less replaced by Bob Welch early 70ish. This song is vintage Welch FM..
I stopped paying attention, and they reemerged with Stevie Nicks and Lindsey Buckingham, churning out popular hits.
Welch, who took his own life about 10 years ago, had some solo stuff.