Ku sii qor faqradan - Theodore wuxuu bilaabay xirfadiisa hockey-ga yar ee Ururka Hockey-ga Yar ee Aldergrove, kaas oo uu isku caddeeyay inuu yahay ciyaaryahanka ugu fiican taariikhda kooxda. Xilli ciyaareedkiisii guusha ahaa wuxuu ku guuleystay xulashada 2010 WHL Bantam Draft, ee Seattle Thunderbirds. Intii uu la joogay kooxda, Theodore wuxuu ahaa kabtan wuxuuna u tartamay Kooxda Kanada tartamo kala duwan oo caalami ah. Wuxuu ku guuleystay billad dahab ah 2013 IIHF World U18 Championships iyo 2015 World Junior Ice Hockey Championships
iyo billad qalin ah oo ka soo baxday 2019 IIHF World Championship.