Frank Corbett "Flash" Foyston (February 2, 1891 – January 19, 1966) was a Canadian professional ice hockey player and coach.

Foyston was a member of Stanley Cup championship teams three times: with the Toronto Blueshirts in 1914, the Seattle Metropolitans in 1917, and the Victoria Cougars in 1925.

His performance in the 1919 Stanley Cup Finals set or tied 7 NHL records that remain unbroken over a century later.

In 1910–11, Foyston played for the Barrie Athletic Club in the OHA Sr. league and scored 14 goals in 6 games.

[2] At the end of the 1911–12 season the Eaton's challenged the Winnipeg Victorias for the Allan Cup, as amateur champions of Canada, but the Toronto club was defeated over two games by an aggregate score of 5–24 (4–8, 1–16), and Foyston went scoreless in the series.

In the 1914 Stanley Cup Finals against the PCHA's Victoria Aristocrats, Foyston scored two goals, including the series-clincher for Toronto.

[5] Foyston was conscripted into the Canadian Expeditionary Force on April 2, 1918, as part of the First World War, however after a month he was released to join the Royal Flying Corps.

The Victoria franchise was purchased by the National Hockey League's Detroit Cougars, and Foyston played for the team during the next two seasons.

Foyston then became the first coach and general manager of the Seattle Seahawks of the North West Hockey League.

[10] Two of the other players who accomplished the same feat were teammates of Foyston on all three of his Stanley Cup wins: goaltender Hap Holmes and forward Jack Walker.