Career
Kolsi, a midfielder, joined Willem II in the summer of 2004 after previously playing for Football Club Jokerit in the Finnish Veikkausliiga. He was a regular for the Finnish Under-21 national team He left the Dutch club in 2006 and has played since then for TOP Oss, Football Club Eindhoven before coming in summer 2007 to Slovenia where he played with NK Maribor and NK Rudar Velenje in the Slovenian PrvaLiga.
Kolsi made a brief return to his old club Willem II in January 2012 before coming back to Slovenia this time for NK Celje for the season 2012-2013.
He was part of the Finnish team at the 2002 Union of European Football Associations European Under-17 Football Championship.
