Brodziak was drafted 14th overall in the 1999 WHL Bantam Draft by the Moose Jaw Warriors of the Western Hockey League (WHL), where he spent his entire junior career. He debuted as a 15-year-old in the final two games of the 1999–2000 season, and won a full-time spot with the team the following season. For the next two seasons, Brodziak played a minor role, scoring 10 times in 129 games. On the advice of his agent, he opted into the 2002 NHL Entry Draft, but went unselected.