 Between 1998 and 2009, he played 363 games in the Danish Superliga, which makes him the 5th most capped player and the most capped foreigner.After a turbulent time in Denmark, Onyszko returned to Poland and signed a short-term contract with Odra Wodzislaw on 13 January 2010.The club came last in the league this season and were relegated, but Onyszko's displays were impressive enough to earn him a 2-year contract with Polonia Warsaw, which he signed in May 2010.