| Lee Spick defeated Sean O'Neill |
2005 World Championship Snooker |
| Michael Holt defeated Sean O'Neill |
2005 China Open Snooker |
| Sean O'Neill defeated Patrick Wallace |
2005 China Open Snooker |
| Sean O'Neill defeated Mike Dunn |
2005 China Open Snooker |
| Sean O'Neill defeated Stefan Mazrocis |
2005 China Open Snooker |
| Alfie Burden defeated Sean O'Neill |
2005 Irish Masters Snooker |
| Rory McLeod defeated Sean O'Neill |
2005 Malta Cup Snooker |
| Rod Lawler defeated Sean O'Neill |
2005 Welsh Open Snooker |
| Sean O'Neill defeated Leo Fernandez |
2005 Welsh Open Snooker |
| Simon Bedford defeated Sean O'Neill |
2004 UK Championship Snooker |
| Tom Ford defeated Sean O'Neill |
2004 British Open Snooker |
| Rod Lawler defeated Sean O'Neill |
2004 Grand Prix Snooker |
| Ben Woollaston defeated Sean O'Neill |
2004 World Championship Snooker |
| Sean O'Neill defeated Andy Lee |
2004 World Championship Snooker |
| Bradley Jones defeated Sean O'Neill |
2003 Masters Qualifying Event Snooker |
| Sean O'Neill defeated Atthasit Mahitthi |
2003 Masters Qualifying Event Snooker |
| Kuldesh Johal defeated Sean O'Neill |
2004 Challenge Tour - Event 4 Snooker |
| Sean O'Neill defeated Troy Shaw |
2004 Challenge Tour - Event 4 Snooker |
| Sean O'Neill defeated David John |
2004 Challenge Tour - Event 4 Snooker |
| Sean O'Neill defeated Alex Davies |
2004 Challenge Tour - Event 4 Snooker |
| Steve James defeated Sean O'Neill |
2004 Challenge Tour - Event 3 Snooker |
| Sean O'Neill defeated Craig Taylor |
2004 Challenge Tour - Event 3 Snooker |
| Sean O'Neill defeated Lee Spick |
2004 Challenge Tour - Event 3 Snooker |
| Sean O'Neill defeated Darren Clarke |
2004 Challenge Tour - Event 3 Snooker |
| Sean O'Neill defeated Marvin Aldridge |
2004 Challenge Tour - Event 3 Snooker |
| Sean O'Neill defeated James Croxton |
2004 Challenge Tour - Event 3 Snooker |
| David McDonnell defeated Sean O'Neill |
2003 Challenge Tour - Event 2 Snooker |
| Sean O'Neill defeated Karl Burrows |
2003 Challenge Tour - Event 2 Snooker |
| Sean O'Neill defeated Leonard de Griffa |
2003 Challenge Tour - Event 2 Snooker |
| Stefan Mazrocis defeated Sean O'Neill |
2003 Challenge Tour - Event 1 Snooker |
| Sean O'Neill defeated Gary Lees |
2003 Challenge Tour - Event 1 Snooker |
| Sean O'Neill defeated Mike Hallett |
2003 Challenge Tour - Event 1 Snooker |
| Sean O'Neill defeated Troy Shaw |
2003 Challenge Tour - Event 1 Snooker |
| Sean O'Neill defeated Albert Kenny |
2003 Challenge Tour - Event 1 Snooker |
| Stephen Croft defeated Sean O'Neill |
2003 World Championship Snooker |
| Sean O'Neill defeated Kuldesh Johal |
2003 World Championship Snooker |
| Michael Rhodes defeated Sean O'Neill |
2003 Challenge Tour - Event 4 Snooker |
| Marvin Aldridge defeated Sean O'Neill |
2002 Benson and Hedges Championship Snooker |
| Ian Martin defeated Sean O'Neill |
2003 Challenge Tour - Event 3 Snooker |
| Sean O'Neill defeated Carlo Giagnacovo |
2003 Challenge Tour - Event 3 Snooker |
| Sean O'Neill defeated Chris Melling |
2003 Challenge Tour - Event 3 Snooker |
| Michael Rhodes defeated Sean O'Neill |
2003 Challenge Tour - Event 2 Snooker |
| Sean O'Neill defeated Marvin Aldridge |
2003 Challenge Tour - Event 2 Snooker |
| Tony Chappel defeated Sean O'Neill |
2002 World Championship Snooker |
| Sean O'Neill defeated Stefan Mazrocis |
2002 World Championship Snooker |
| Sean O'Neill defeated Keith Chalmers |
2002 World Championship Snooker |
| Sean O'Neill defeated Tam Mustafa |
2002 World Championship Snooker |
| Sean O'Neill defeated Les Dodd |
2002 World Championship Snooker |
| Sean O'Neill defeated Lee Bovis |
2002 World Championship Snooker |
| Sean O'Neill defeated Mohammed Sajjad |
2002 World Championship Snooker |
| Ian Brumby defeated Sean O'Neill |
2002 Challenge Tour - Event 1 Snooker |
| Kurt Maflin defeated Sean O'Neill |
2001 World Championship Snooker |
| James Kay defeated Sean O'Neill |
2000 World Championship Snooker |
| Sean O'Neill defeated Ryan Johnston |
2000 World Championship Snooker |