Pari gbolohun ti o tẹle: Byfuglien ṣe ere hockey junior pataki fun awọn Brandon Wheat Kings ati Prince George Cougars ti Western Hockey League (WHL). Àwọn Chicago Blackhawks ló gba Byfuglien lọ́dún
Ọdún 2003. Ni akọkọ o jẹ olugbeja ni ibẹrẹ akoko 2007-08, o gbe lọ si ipo apa ọtun lati fun ẹgbẹ ni ara ti o tobi julọ nitosi net.