Head to Head
| European Championship 2020 | 2020/10/29 20:00 | Joe Cullen v William O'Connor | 3-6 |
| European Tour 11 2019 | 2019/09/08 14:05 | William O'Connor v Joe Cullen | 3-6 |
Home History
| Players Championship 20 2020 | 2020/11/11 18:50 | Joe Cullen v Jose De Sousa | 2-7 |
| Players Championship 20 2020 | 2020/11/11 17:30 | Joe Cullen v Mickey Mansell | 6-4 |
| European Championship 2020 | 2020/10/29 20:00 | Joe Cullen v William O'Connor | 3-6 |
| European Tour 4 2020 | 2020/10/25 21:25 | Michael van Gerwen v Joe Cullen | 5-8 |
| European Tour 4 2020 | 2020/10/25 20:40 | Joe Cullen v Michael Smith | 7-3 |
| European Tour 4 2020 | 2020/10/25 19:00 | Ross Smith v Joe Cullen | 4-6 |
| European Tour 4 2020 | 2020/10/25 14:45 | Dave Chisnall v Joe Cullen | 1-6 |
| European Tour 4 2020 | 2020/10/24 12:30 | Joe Cullen v Robert Marijanovic | 6-1 |
Away History
| PDC Winter Series 3 2020 | 2020/11/12 19:05 | Gerwyn Price v William O'Connor | 7-3 |
| PDC Winter Series 3 2020 | 2020/11/12 17:30 | William O'Connor v Jonny Clayton | 6-5 |
| European Championship 2020 | 2020/10/31 19:00 | William O'Connor v James Wade | 4-10 |
| European Championship 2020 | 2020/10/30 12:00 | William O'Connor v Jamie Hughes | 10-3 |
| European Championship 2020 | 2020/10/29 20:00 | Joe Cullen v William O'Connor | 3-6 |
| European Tour 3 2020 | 2020/10/17 20:00 | Nathan Aspinall v William O'Connor | 6-1 |
| European Tour 3 2020 | 2020/10/16 20:30 | Chris Dobey v William O'Connor | 3-6 |
| European Tour 2 2020 | 2020/09/26 14:25 | Rob Cross v William O'Connor | 6-3 |