Sephton's relationship with Liverpool Football Club began in 1971, when he wrote to club secretary, Peter Robinson, applying to be the stadium announcer. His first match was against Nottingham Forest on 14 August, 1971, which also marked the debut of Kevin Keegan. Since then, Sephton has occupied the room above the scoreboard on the Kop side of the Kenny Dalglish stand, for all but a handful of home fixtures. His duties include DJing for almost two hours before kick off, operating the scoreboard, announcing goalscorers and substitutions, and making commercial announcements. However, his most important role is playing You'll Never Walk Alone over the PA system just before kickoff; a tradition at Anfield that dates back to October 1963. He has played You'll Never Walk Alone at the end of special Liverpool victories as well, notably the second leg of the 2005 Champions League semifinal against Chelsea that saw Liverpool qualify for the final in Istanbul. Sephton plays a major role in the Anfield matchday experience.