The Mustangs are members of Ontario University Athletics, one of the four regional associations within the national governing body of U Sports.
By the 1913-14 season, hockey became the most popular sport on campus and a combined faculty team went on to represent Western in the Canadian Hockey Association championships, playing Berlin (now Kitchener, Ontario) in the final match.
[4] In the 1932-33 season, Western won its first Canadian Intermediate Intercollegiate Championship by beating the University of Ottawa in the finals 6-1.
Hockey at Western proceeded into the 1930s but was suspended in 1941-44 due to World War II.
[4] When the London Arena was not available for the 1936–37 season, J. Howard Crocker arranged to play home games in Brantford, and have practices an outdoor rink on campus.
During this season, L'Heureux acted as the coach and the team placed third in a ten-team league, finishing 4th in the playoffs.
The team had medium success during this time, but it started to rise when Steve Rucchin joined the Mustangs from 1990 to 1994.