 He was crowned Bundesliga topscorer that season (24 goals in 33 games), as he had the season before (34 goals in 34 appearances).After he left Köln, he played for several seasons in France and Switzerland, before returning to West Germany.Müller is the son of Heinz Kaster, who played as a defender for FC St. Pauli and Kickers Offenbach in the early 1950s.