Francis John Fennelly
- Bats Right, Throws Right
- Height 5' 8", Weight 168 lb.
- Debut May 1, 1884
- Final Game June 18, 1890
- Born February 18, 1860 in Fall River, MA USA
- Died August 4, 1920 in Fall River, MA USA
Frank Fennelly was one of the few competent players on the 1884 Washington Statesmen. When the team ran into financial difficulty, they sold Fennelly to the Cincinnati Reds, where he replaced Chick Fulmer at shortstop. On the year, Fennelly was arguably the top player in the American Association, placing in the top five in OBP and slugging while playing a key defensive position.
In 1888 Fennelly spent his fourth season on the same infield as Bid McPhee, John Reilly and Hick Carpenter, a 19th-century record. He also served as the team's captain until he was sold to the Philadelphia Athletics late in the year due to his struggles as he had faded quickly from his fast career start.
Fennelly was from Fall River, MA, an early hotbed of baseball.
After retirement, Fennelly went into politics in New England.