In 1964, Welch joined the Los Angeles-based vocal group The Seven Souls as a guitarist. The Seven Souls lost a battle of the bands competition, the prize being a contract with Epic Records, to Sly and the Family Stone. The Seven Souls' 1967 single "I'm No Stranger" made no impact at the time of its release, despite subsequent issue in France and Italy. Its B-side, "I Still Love You", has since become a Northern Soul anthem, with original copies selling up to £400. The Seven Souls broke up in 1969.