Kosi made his World Cup debut March 2011 in Kranjska Gora, Slovenia. Kosi made his World Cup debut March 2011 in Kranjska Gora, Slovenia. ■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
2013 World Ski Championships, where his best result was a 12th place in super combined. Kosi represented Slovenia at the 2014 Winter Olympics, where he reached 24th place in downhill. Kosi represented Slovenia at the 2014 Winter Olympics, where he reached 24th place in downhill.