Andrew J Leonard (June 1, 1846 – August 21, 1903) was the first Irish born professional baseball player, who played outfield and was also a utility infielder. He played left field for the original Cincinnati Red Stockings, the first fully professional baseball team. He was one of five men to play regularly for both the Cincinnati and the Boston Red Stockings, the latter winning six championships during his seven seasons. He played several infield positions on lesser teams in his early twenties but left field was his regular professional position.
Born 1846 in Kilsalagh, County Cavan and raised in Newark, New Jersey after immigrating with his mother and siblings in 1848. His parents were Andrew Leonard and Ann Leddy. Ann's parents were Thomas Leddy and Mary Reilly.