Champoux played for the Palestre Nationale in Quebec in 1960-61, and in 39 games, picked up three shutouts and a 3.08 gaa. In 1961-62, Champoux played in the only eight games of his major junior career, starting for the Montreal Junior Canadiens. In 1962-63, he returned to the MMJHL where he played with the St. Jerome Alouettes. Thanks to a strong season with St. Jerome, Champoux earned himself a spot with the Cincinnati Wings of the CPHL the following year. He quickly established himself as the team's top goalie, and appeared in 60 games, sporting a rather lofty 5.60 gaa. He was called up by the Detroit Red Wings that year, but never actually dressed for game action, so although he was considered part of the team, he did not have any NHL games put to his credit.

In 1964-65, Champoux played four games with the Memphis Wings and one game with the Minneapolis Bruins of the CPHL before joining the Pittsburgh Hornets of the AHL for 13 games. He remained in Pittsburgh for another year before being loaned to the WHL's San Diego Gulls by the Detroit Red Wings in September, 1966. As it turned out, the loan turned into a trade and Champoux remained in San Diego for more than three years before being temporarily loaned to the Kansas City Blues of the CHL for the loan of Gary Edwards.

Following a couple more years with San Diego, Champoux signed a free-agent contract with the NHL's California Golden Seals for the 1973-74 season. He played in 17 games that year, going 2-11-3 with a 5.07 gaa while playing for one of the worst teams in the league. The balance of Champoux's season was spent in Salt Lake as a member of the Golden Eagles of the WHL, where he started 44 games, where he compiled a record of 23-16-3. In 1974-75, Champoux played for the Syracuse Blazers of the NAHL and the Winston-Salem Polar Bears, where he remained for another two years before retiring after the 1976-77 campaign.

Courtesy of the Hockey Hall of Fame