William Junior Chalmers (born January 24, 1934 - d. December 7, 1994), was a professional ice hockey player who played for the Guelph Biltmore Mad Hatters, winning the Memorial Cup in 1952 as national junior ice hockey champions of Canada, and the George Richardson Memorial Trophy as eastern Canadian champions the same year. On November 21, 1953, the 20-year-old Chalmers played one game with the NHL's New York Rangers at Maple Leaf Gardens. This was the only NHL game of his career, earning him a spot on the list of NHL one gamers. Chalmers died on December 7, 1994.