MacKenzie wuxuu bilaabay xirfadiisa ciyaareed ee dhalinyarada isagoo u ciyaaraya kooxda uu ku dhashay ee Sudbury Wolves ee Ontario Hockey League (OHL). Ka dib xilli ciyaareedkiisii labaad, oo uu ku kordhiyay dhibcaha uu ka soo saaray 20 illaa 87, waxaa qortay Atlanta Thrashers wareegga shanaad, guud ahaan 128, ee 1999 National Hockey League (NHL)
Waxaad Xilli ciyaareedkiisii ugu dambeeyay, wuxuu diiwaan galiyay 40 gool iyo 89 dhibcood oo hogaaminaya Wolves dhibco ahaan wuxuuna ku dhammeeyay lixaad OHL. Waxa uu sidoo kale ku dhammeeyey boqolkiiba 67 boqolkiiba, isagoo ku guuleystay labada OHL iyo Canadian Hockey League (CHL) Face-off Awards.