Ia tusia se faaauauga mo lenei palakalafa - Na amata e Theodore lana galuega o le hockey laiti i le Aldergrove Minor Hockey Association, lea na ia faavaeina ai o ia lava o le tagata taalo sili ona mataʻina i le talafaasolopito o le au. O lana galuega laiti manuia na maua ai e ia se filifiliga i le 2010 WHL Bantam Draft, e le Seattle Thunderbirds. I le taimi o lona nofo ai i le 'au, sa avea Theodore ma kapeteni ma tauva mo Team Canada i tauvaga faavaomalo eseese. Na ia manumalo i se pine auro i le 2013 IIHF World U18 Championships ma le 2015 World Junior Ice Hockey Championships
ma se pine siliva i le 2019 IIHF World Championship.