John Joseph O'Neill (10 January 1873 – 29 June 1935) was a catcher in Major League Baseball who played for the St. Louis Cardinals (1902–03), Chicago Cubs (1904–05) and Boston Beaneaters (1906).
John Joseph O'Neill (January 10, 1873 – June 29, 1935) was a baseball player who participated in Major League Baseball games for the St. Louis Cardinals, Chicago Cubs, and Boston Beaneaters from 1902 to 1906.