The youngest player? A goalkeeper: the youngest player in Fortuna Düsseldorf’s Bundesliga history is goalkeeper Frank Kirn. On his debut, a 0–4 defeat to 1. FC Köln on 18 October 1986, he was 17 years, eight months and one day old, overtaking legendary libero Ralf Loose, who had debuted for Fortuna in 1978 at 18 years, six months and four days.