In 1971, Welch auditioned for Fleetwood Mac at Kiln House, their retreat in England. The band had recently lost one of its front-line members, guitarist Jeremy Spencer, and were looking for a replacement. Judy Wong, a friend and part-time secretary for the band, recommended her high school friend Welch. The band had a few meetings with Welch and decided to hire him, despite not having previously played with him, after listening to some of his songs on tape. Welch was assigned rhythm guitar, backing up lead guitarist Danny Kirwan. Welch eventually lived in the band's communal home, 'Benifold', located in Hampshire.