May Tully (born 1880s – March 9, 1924) was a Canadian actress, writer, director, and producer in theatre and film, and, according to sportswriter Damon Runyon, "perhaps the greatest woman baseball fan that ever lived.

[4] Tully was credited as a writer on eight silent films: The Winning of Beatrice (1918),[2] Mary's Ankle (1920), His Wife's Money (1920), Bucking the Tiger (1921), The Old Oaken Bucket (1921), Chivalrous Charley (1921), Kisses (1922), and That Old Gang of Mine (1925).

She wrote the play Mary's Ankle (1916),[6] "an improbable but delectable farce"[7] starring Irene Fenwick, Zelda Sears, and Bert Lytell on Broadway;[8] it was also a success in other cities.

[13] In Curves (1911-1912), a vaudeville sketch she wrote about baseball,[14] she co-starred with off-season professional players Christy Mathewson and Chief Meyers,[15] bringing sports fans to the theatre.

[22] "She had a wide acquaintance among baseball men, players, managers, magnates, and writers," noted Damon Runyon, and was accepted into their company "because of her understanding of the game and its atmosphere.