Career
He played twelve seasons in the majors from 1914 to 1925 for the Chicago Chi-Feds/Whales (1914-1915) of the Federal League, then the Chicago Cubs (1916-1922) and the Saint Louis Cardinals (1922-1925) of the National League. Flack was labeled the "goat" of the 1918 Flack"s possible involvement in throwing that has recently come to light. Although nothing conclusive was said, Black Sox pitcher Eddie Cicotte, who threw the 1919, has referenced the 1918 Cubs as having inspired the Black Sox.
Of all the players on that team whose performance was murky, it was Flack, who had multiple strange errors and was picked off twice in one game, who had the most suspicious performance.
He remains the only player to get picked off twice in one game in the
Flack is remembered, along with Cliff Heathcote, for being half of a unique player swap. On May 30, 1922, the Cardinals were playing a Memorial Day doubleheader at Cubs Park.
Between games, Flack was traded for Heathcote. Both men appeared in both games that day.
