 John G. Diefenbaker Senior High Schools' wrestling team is among the best in Alberta, having won seven city championships as well as five Provincial titles.Its wrestling team was also the top ranked High School team in Canada in 2007, 2008 & 2009 according to the Canadian National Wrestling Association, having a large number of its members compete and obtain medals at the National Championships.In 2008 they set a Calgary record with 120 points in the city championships.