In 1914, Frank Fredrickson studied law at the University of Manitoba. The Great War interrupted his education and Fredrickson enlisted in the armed forces and served with the 196th Battalion.
Returning to Winnipeg, Fredrickson joined the Icelandic Winnipeg Falcons hockey team. He helped the Falcons to an Allan Cup victory in 1920 and the club was selected to represent Canada at the Olympics. In Antwerp, Belgium, Fredrickson scored both goals in a 2-0 victory over the United States, was the top scorer at the tournament, and was named the outstanding player of the competition en route to leading the Falcons to the first Olympic Gold Medal in hockey. In 1921, Lester Patrick invited Fredrickson to play with the Victoria Aristocrats (later the Cougars) of the Pacific Coast League. As the leading scorer in 1921 and 1923, Fredrickson scored 41 goals in each season - an amazing feat since forward passes were not allowed in those days. He scored 142 goals in total during his career in the PCL.
In 1926, Fredrickson was sold to the Boston Bruins of the National Hockey League but quietly signed a contract worth $6000.00 with the Detroit Red Wings for the 1926-27 season, $2000.00 more than what Boston offered. Fredrickson was unsuccessful in Detroit and ironically was sold to Boston in mid-season. With Fredrickson's assistance, the Bruins competed in the Stanley Cup final but lost to the Ottawa Senators. Fredrickson was then sold to the Pittsburgh Pirates where he became the NHL's first player-coach. During the 1931-32 season, Fredrickson's playing career came to an abrupt end when he tore a knee cartilage. After his return to Winnipeg, Fredrickson assumed the coaching duties with the senior and junior Falcons. Fredrickson was elected to the Canadian Hockey Hall of Fame in 1958.