Mezue ahịrịokwu na-esonụ: Mgbe ọ na-emecha ọrụ na-eto eto na Western Hockey League (WHL) na Prince George Cougars, Mason bụ onye mbụ e dere 122nd n'ozuzu na
1995 NHL Entry Draft site na New Jersey Devils. Na-amalite ọrụ ọkachamara ya na nke ekwensu, Mason bịanyere aka na ya dị ka onye nweere onwe ya site n'aka Mighty Ducks nke Anaheim na June 27, 1997. Mgbe oge ọ na-agba bọọlụ rookie ya na ndị otu Ducks na American Hockey League (AHL), ndị Cincinnati Mighty Ducks, na mgbede nke oge nke abụọ ya, Anaheim gbanwere Mason na Marc Moro na ndị Nashville Predators iji gbanwere Dominic Roussel.