Pedzisa mutsara unotevera: Morrissey akamiririra Canada mumakwikwi akawanda epasi rose, kusanganisira IIHF World U18 Championships, Ivan Hlinka Memorial Tournament uye IIHF World U20 Championships. Morrissey akabatsira zvikuru mukubatsira chikwata chevadiki pasi pemakore gumi nemasere kuhwina ndarama pa
2013 IIHF World U18 Championships, pamwe nechikwata chepasi pemakore makumi maviri pa2015 World Junior Ice Hockey Championship. Akasarudzwa ku2015 World Junior All-Star First Team, achipedza aine mapoinzi mana uye +9 plus-minus rating.