Polish-born West German light-middleweight boxer Manfred Zielonka won a bronze medal at the 1984 Los Angeles Olympics. He had to withdraw from his semi-final against the eventual champion Frank Tate (USA), due to a broken hand. Two years earlier he had also won a bronze medal at the World Amateur Boxing Championships.
Zielonka won his only German national title in 1981. He was born in Poland as a late repatriate of the German minority and emigrated to West Germany in 1967. He later was employed by the municipality of his hometown, Düren.