Franklin Marion Donnelly (October 7, 1869 – February 3, 1953) was a professional baseball player. He was a right-handed pitcher for parts of two seasons (1893–94) with the Chicago Colts. For his career, he compiled a 3–1 record in 7 appearances, with a 6.36 earned run average and 7 strikeouts. Donnelly was born in Tamaroa, Illinois and later died in Canton, Illinois at the age of 83.