There is more than one person named John O'Neill in baseball history:
- John O'Neill (o'neijo01) - John J. O'Neill, catcher from 1899-1902
- John O'Neill (o'neibi01) - William John O'Neill, outfielder from 1904-1906, also known as Bill O'Neill
Disambiguation Pages are for subjects or titles that might refer to multiple possible BR Bullpen subjects. If your link directed you to this page, you may want to update it to one of the pages above.