| Result | Tournament |
|---|---|
| Jamie O'Neill defeated James O'Sullivan | 2012 Pink Ribbon Snooker |
| Jimmy Robertson defeated James O'Sullivan | 2012 Pink Ribbon Snooker |
| Nic Barrow defeated James O'Sullivan | 1998 UK Tour - Event 1 Snooker |
| James O'Sullivan defeated Colin Mitchell | 1998 UK Tour - Event 1 Snooker |
| James O'Sullivan defeated Jamie Moreland | 1998 UK Tour - Event 1 Snooker |
| James O'Sullivan defeated Cary Kikis | 1998 UK Tour - Event 1 Snooker |
| Malcolm Bilclough defeated James O'Sullivan | 1997 Welsh Open Snooker |
| Andy Lavin defeated James O'Sullivan | 1997 Thailand Open Snooker |
| Jamie Moreland defeated James O'Sullivan | 1997 International Open Snooker |
| Mark Carrington defeated James O'Sullivan | 1997 European Open Snooker |
| Robert Foxall defeated James O'Sullivan | 1997 British Open Snooker |
| James O'Sullivan defeated Anthony O'Connor | 1997 British Open Snooker |
| James O'Sullivan defeated Grant Conquest | 1997 British Open Snooker |
| Barry McNamee defeated James O'Sullivan | 1997 Benson and Hedges Championship Snooker |
| James O'Sullivan defeated Martin Hacker | 1997 Benson and Hedges Championship Snooker |
| Guo Hua defeated James O'Sullivan | 1996 World Championship Snooker |
| Andrew Hannah defeated James O'Sullivan | 1996 Welsh Open Snooker |
| James O'Sullivan defeated Jonathan Bagley | 1996 Welsh Open Snooker |
| James O'Sullivan defeated Marcus Lord | 1996 Welsh Open Snooker |
| Neil Tomkins defeated James O'Sullivan | 1996 UK Championship Snooker |
| James O'Sullivan defeated James Reynolds | 1996 UK Championship Snooker |
| Richard Batty defeated James O'Sullivan | 1996 Thailand Open Snooker |
| James O'Sullivan defeated John Whitty | 1996 Thailand Open Snooker |
| Brett Patmore defeated James O'Sullivan | 1996 International Open Snooker |
| James O'Sullivan defeated Ian Glover | 1996 International Open Snooker |
| John Mills defeated James O'Sullivan | 1996 Grand Prix Snooker |
| Alfonso Bellusci defeated James O'Sullivan | 1996 European Open Snooker |
| James O'Sullivan defeated Stephen Pieroni | 1996 European Open Snooker |
| Grant Conquest defeated James O'Sullivan | 1996 British Open Snooker |
| David Gray defeated James O'Sullivan | 1996 Asian Classic Snooker |
| Wayne Lloyd defeated James O'Sullivan | 1995 World Championship Snooker |
| James O'Sullivan defeated Paul Thomerson | 1995 World Championship Snooker |
| Anthony Buckley defeated James O'Sullivan | 1995 Welsh Open Snooker |
| Chris Shade defeated James O'Sullivan | 1995 UK Championship Snooker |
| Declan Hughes defeated James O'Sullivan | 1995 Thailand Classic Snooker |
| James O'Sullivan defeated Paul Reeve | 1995 Thailand Classic Snooker |
| Kieran McMahon defeated James O'Sullivan | 1995 Malta Masters Snooker |
| Marc Devon defeated James O'Sullivan | 1995 International Open Snooker |
| Tony Kenny defeated James O'Sullivan | 1995 Grand Prix Snooker |
| Darren Paris defeated James O'Sullivan | 1995 German Open Snooker |
| James O'Sullivan defeated Eden Butterworth | 1995 German Open Snooker |
| Richard Culham defeated James O'Sullivan | 1995 British Open Snooker |
| Tai Pichit defeated James O'Sullivan | 1994 UK Championship Snooker |
| Graham Fisken defeated James O'Sullivan | 1994 Grand Prix Snooker |
| James O'Sullivan defeated Roy Bigg | 1994 Grand Prix Snooker |
| Darren Paris defeated James O'Sullivan | 1994 European Open Snooker |
| Sam Chong defeated James O'Sullivan | 1994 Dubai Classic Snooker |
| Karl Burrows defeated James O'Sullivan | 1994 Benson and Hedges Championship Snooker |