Weston joined Fleetwood Mac in late 1972 as a replacement for troubled guitarist Danny Kirwan. His contributions to the band’s 1973 albums, Penguin and Mystery to Me, were formidable, featuring outstanding slide guitar as well as accomplished harmonic playing and banjo work. Weston also sang with Christine McVie on the track “Did You Ever Love Me,” and wrote the instrumental, “Caught in the Rain,” which closed out the Penguin album.
In late 1973, Fleetwood Mac discovered that Weston had been having an affair with Mick Fleetwood’s wife, Jenny Boyd, and he was subsequently fired. During his post-Fleetwood Mac years, Weston recorded with the likes of Steve Marriott, Murray Head and Long John Baldry. He also released several solo albums, most of which are now out of print.