John Kelleher (September 13, 1893 – August 21, 1960) was a backup infielder in Major League Baseball, playing mainly at third baseman for four teams between the 1912 and 1924 seasons. Listed at 5 ft 11 in (1.80 m), 150 lb., he batted and threw right-handed. In a six-season career, Kelleher was a .293 hitter (206-for-703) with 10 home runs and 89 RBI in 235 games, including 81 runs, 29 doubles, eight triples, and nine stolen bases. Following his playing career, he was an assistant baseball coach at Harvard University in 1925 and head coach at Brown University from 1930 to 1941.