Rousseau played junior hockey for the Verdun Maple Leafs, Montreal Junior Royals, and the Montreal Nationale. He won the Memorial Cup in 1950 with the Junior Royals. He joined the Montreal Royals of the Quebec Senior Hockey League (Major) in 1951 and played with them for three seasons. In 1952-53 he got a two game callup to the Montreal Canadiens. Rousseau played five more seasons in the minor pros, retiring first in 1958. He returned in 1960 with the senior Granby Vics. He also played for the Montreal Olympics in the 1961-62 Allan Cup Final. Another retirement followed that year.