Rampungake ukara ing ngisor iki: Walman main hoki junior karo Toronto Jr. Canadiens ing Liga Hoki Junior Ontario (OJHL) sadurunge nindakake hoki perguruan tinggi karo Providence College of the Hockey East. Sadurungé mangsa freshman karo Friars, Walman kapilih ing
2014 NHL Entry Draft ing babak katelu, 82nd sakabèhé, dening St. Louis Blues.