| Result | Tournament |
|---|---|
| Anthony Hamilton defeated Jamie O'Neill | 2013 Wuxi Classic Snooker |
| Ian Burns defeated Jamie O'Neill | 2013 World Open Snooker |
| Thanawat Thirapongpaiboon defeated Jamie O'Neill | 2013 World Championship Snooker |
| Alan McManus defeated Jamie O'Neill | 2013 Welsh Open Snooker |
| Xiao Guodong defeated Jamie O'Neill | 2013 German Masters Snooker |
| Jimmy White defeated Jamie O'Neill | 2013 European Tour - Event 6 Snooker |
| Graeme Dott defeated Jamie O'Neill | 2013 European Tour - Event 1 Snooker |
| Jamie O'Neill defeated Cosmin Constantin | 2013 European Tour - Event 1 Snooker |
| Michael Wasley defeated Jamie O'Neill | 2013 China Open Snooker |
| Nigel Bond defeated Jamie O'Neill | 2013 Australian Open Snooker |
| Jamie O'Neill defeated Phil O'Kane | 2013 Australian Open Snooker |
| Kurt Maflin defeated Jamie O'Neill | 2012 Wuxi Classic Snooker |
| Igor Figueiredo defeated Jamie O'Neill | 2012 World Championship Snooker |
| Jamie O'Neill defeated Stephen Ormerod | 2012 World Championship Snooker |
| Jamie O'Neill defeated David Gray | 2012 World Championship Snooker |
| James Wattana defeated Jamie O'Neill | 2012 UK Championship Snooker |
| Jamie O'Neill defeated Robbie Williams | 2012 UK Championship Snooker |
| Tony Drago defeated Jamie O'Neill | 2012 Shanghai Masters Snooker |
| Jay Bullen defeated Jamie O'Neill | 2012 Q School - Event 3 Snooker |
| Jamie O'Neill defeated Scott Donaldson | 2012 Q School - Event 2 Snooker |
| Jamie O'Neill defeated Gary Wilson | 2012 Q School - Event 2 Snooker |
| Jamie O'Neill defeated Duane Jones | 2012 Q School - Event 2 Snooker |
| Jamie O'Neill defeated Khizar Raoof | 2012 Q School - Event 2 Snooker |
| Jamie O'Neill defeated Mohammed Omar | 2012 Q School - Event 2 Snooker |
| Jeff Cundy defeated Jamie O'Neill | 2012 Q School - Event 1 Snooker |
| John Higgins defeated Jamie O'Neill | 2012 PTC - Event 4 Snooker |
| Dominic Dale defeated Jamie O'Neill | 2012 PTC - Event 3 Snooker |
| Jamie O'Neill defeated Allan Taylor | 2012 PTC - Event 3 Snooker |
| Shaun Murphy defeated Jamie O'Neill | 2012 PTC - Event 2 Snooker |
| David Grace defeated Jamie O'Neill | 2012 PTC - Event 12 Snooker |
| Jamie O'Neill defeated Gary Wilson | 2012 PTC - Event 12 Snooker |
| Anthony McGill defeated Jamie O'Neill | 2012 PTC - Event 1 Snooker |
| Peter Lines defeated Jamie O'Neill | 2012 Pink Ribbon Snooker |
| Jamie O'Neill defeated Travis Furnish | 2012 Pink Ribbon Snooker |
| Jamie O'Neill defeated James O'Sullivan | 2012 Pink Ribbon Snooker |
| Michael Wasley defeated Jamie O'Neill | 2012 International Championship Snooker |
| Mark Selby defeated Jamie O'Neill | 2012 European Tour - Event 5 Snooker |
| Jack Lisowski defeated Jamie O'Neill | 2012 European Tour - Event 3 Snooker |
| Andrew Norman defeated Jamie O'Neill | 2012 European Tour - Event 2 Snooker |
| Sam Baird defeated Jamie O'Neill | 2012 Australian Open Snooker |
| Ben Woollaston defeated Jamie O'Neill | 2011 World Championship Snooker |
| Matthew Selt defeated Jamie O'Neill | 2011 Welsh Open Snooker |
| Jamie O'Neill defeated Kyren Wilson | 2011 Welsh Open Snooker |
| Zhang Anda defeated Jamie O'Neill | 2011 Q School - Event 3 Snooker |
| Antony Parsons defeated Jamie O'Neill | 2011 Q School - Event 2 Snooker |
| David Grace defeated Jamie O'Neill | 2011 Q School - Event 1 Snooker |
| Jamie O'Neill defeated Mei Xiwen | 2011 Q School - Event 1 Snooker |
| Jamie O'Neill defeated Ross Jones | 2011 Q School - Event 1 Snooker |
| Jamie O'Neill defeated Rune Kampe | 2011 Q School - Event 1 Snooker |
| Luca Brecel defeated Jamie O'Neill | 2011 PTC - Event 9 Snooker |