In 1960, Rousseau was loaned to the Kitchener-Waterloo Dutchmen, the team that would represent Team Canada, at the 1960 Winter Olympics in Squaw Valley. Canada would finish with a silver medal at the tournament, while the USA won gold and the Soviets took the bronze. Rousseau scored 5 goals, 4 of which came in a 19-1 victory over Japan, and 9 points in 7 games during Canada's Olympic run.