The Junior Mustangs Program officially began in 2011 with the creation of the Junior Mustangs Football Club. Offering teams that compete in both the OVFL and LMFL, the goal of the program was to improve and aid in the development of young athletes in the London area.
Three years later, the program expanded to include Junior Mustangs Hockey. Sixteen GLHA teams now bear the Junior Mustang name while proudly dressing in school colours.
As a whole, the program serves as a bridge between the Western Mustangs and the surrounding community. Mustang athletes and coaches are highly integrated within the Junior Mustangs program, lending services as coaches and dropping by practices for encouragement.