Mezue ahịrịokwu na-esonụ:
2015 IIHF World Junior Championship, Demko bụ onye na-eche nche na-amalite, na-amalite na 7 nke egwuregwu 8. N'agbanyeghi na ndi otu a kpochapụrụ na Quarterfinals, Demko kwụsịrị nke atọ na asọmpi ahụ n'etiti ndị na-eche nche na 1.74 GAA na.938 pasent na-azọpụta.