|Born: January 10, 1873|
Maum, County Galway, Ireland
|Died: June 29, 1935 (aged 64)|
Scranton, Pennsylvania, U.S.
|April 21, 1902, for the St. Louis Cardinals|
|Last MLB appearance|
|October 3, 1906, for the Boston Beaneaters|
|Runs batted in||74|
John Joseph "Jack" O'Neill (10 January 1873 - 29 June 1935) was catcher in Major League Baseball who played for the St. Louis Cardinals (1902-03), Chicago Cubs (1904-05) and Boston Beaneaters (1906). He batted and threw right-handed.
O'Neill was one of four major league brothers. Steve was a catcher and manager, Jim a shortstop, and Mike, who also was born in Ireland, was a pitcher and formed a brother battery with Jack for the St. Louis Cardinals.
O'Neill shared catching duties for the Cardinals, Cubs and Beaneaters in a modest span of five years. He was a smart runner with some speed and usually was used in pinch-running situations. His most productive season came in 1903, when he posted career-highs in batting average (.236), runs (23), hits (58), doubles (nine), runs batted in (21), stolen bases (11) and games played (75).
O'Neill died in Scranton, Pennsylvania, at the age of 62.