Kammala jumla mai zuwa: Ta kasance memba na kungiyar Slovenian biathlon daga 2002 zuwa 2017, kasancewar ta kasance mai tsere a gabanin hakan. Sakamakonta mafi kyau a gasar cin kofin duniya ta Biathlon ita ce ta biyu a tseren mutum na kilomita 15 a cikin
Gasar Zakarun Duniya da aka gudanar a Pyeongchang, Koriya a lokacin kakar 2008-09. A Gasar Cin Kofin Duniya ta 2012, Gregorin ya lashe lambar azurfa a tsere mai gauraye, tare da Andreja Mali, Klemen Bauer da Jakov Fak.