Kammala jumla mai zuwa: Yawney ya taka leda a Saskatoon J's na Saskatchewan Junior Hockey League (SJHL), sannan kuma Saskatoon Blades na Yammacin Hockey League (WHL). Yawney ne Chicago Blackhawks suka zaba a cikin
1984 NHL Entry Draft, zagaye na uku, 45th gaba ɗaya. Bayan wasa tare da ƙungiyar hockey ta maza ta Kanada, Yawney ya buga wasa a NHL don Blackhawks, Calgary Flames, da St. Louis Blues.