Leo Patrick Kiely (November 30, 1929 – January 18, 1984) was an American pitcher in Major League Baseball who played between 1951 and 1960 for the Boston Red Sox (1951, 1954–56, 1958–59) and Kansas City Athletics (1960). Listed at 6 feet 2 inches (1.88 m), 180 pounds (82 kg), Kiely batted and threw left-handed. He was born in Hoboken, New Jersey. Kiely led the Red Sox with 12 saves in 1958, while going 5–2 with a 3.00 ERA in 47 relief appearances. He also pitched with the Athletics in 1960, his last major league season. Kiely died from cancer in Montclair, New Jersey at age 54.