However, on 14 January 2008, Wisła Kraków and Kosowski mutually voided the remainder of his contract as a result of not coming to a compromise on a new deal.

Kosowski signed a two-and-a-half-year contract with Spanish second division team Cádiz CF on 25 January 2008.

[3] The next season, he won the Super Cup again and he also appeared in five official group stage matches of the 2009–10 UEFA Champions League with APOEL.

In August 2005 he was part of the national team's triumphant performance at the Valeri Lobanovsky Memorial Tournament 2005.

[5] He was selected to the 23-men national squad for the 2006 FIFA World Cup finals held in Germany, but he played only about 15 minutes against Ecuador.