Kammala jumla mai zuwa: Cozens ya yi aiki a matsayin mataimakin kyaftin na Team Canada a gasar zakarun duniya na 2019 na IIHF U18. Cozens ya lashe zinare tare da Team Canada a Gasar Kofin Duniya ta Junior Ice Hockey ta 2020, inda ya zira kwallaye sau daya a nasarar da suka yi a kan Rasha 4 × 3. Shi da Bowen Byram an nada su co-kafitoci na Team Canada a gasar
2021 Gasar Hockey ta Junior ta Duniya a ranar 26 ga Disamba, 2020, don maye gurbin kyaftin Kirby Dach da ya ji rauni. Bayan ba a ci nasara ba a gasar, Cozens da Kanada sun yi rashin nasara a wasan lambar zinare ga Team USA 2<unk>0.