Career
Karl started his professional career in East Germany, representing Hallescher Football Club and modest BSG Stahl Hettstedt. Almost always a backup at Borussia during his four half-year spell (his best output consisted in 28 games in the 1991-1992 season), Karl left the club in the 1994 summer, prior to the club"s back-to-back league conquests. Following a run-in with coach Ottmar Hitzfeld, prior to this definitive release, he also played five months with Manchester City, on loan.
Karl played one year in Switzerland with Football Club Sion, before returning to his country and represent Hertha Bachelor of Science and Football Club Saint Pauli in the second division.
In his second season at the former, he played 30 matches en route to promotion, but never played again in the top division of his country. In the following three years, he moved abroad again, playing for Vålerenga Fotball (one year) and PFC Lokomotiv Sofia (two).
He became the first German to appear in the A PFG. In 2003, 33-year-old Karl returned to Germany, playing with former East German sides. Two years later, whilst at Chemnitzer Football Club – he also represented VfB Fortuna Chemnitz until his final retirement in 2008 – he became the first player to be arrested in connection with Germany"s match-fixing scandal, being suspected of helping manipulate the results of a May 2004 match between Chemnitz and South Carolina Paderborn 07.
He was given a nine-month suspended prison sentence for his role in the affair, and banned for eight months by the German Football Association.