Head to Head
| United Rugby Championship | 2024/01/01 15:00 | Ospreys v Cardiff Blues | L | 27-21 |
| United Rugby Championship | 2023/04/22 16:15 | Ospreys v Cardiff Blues | W | 21-38 |
| United Rugby Championship | 2023/01/01 15:00 | Cardiff Blues v Ospreys | L | 19-22 |
| United Rugby Championship | 2022/04/23 16:15 | Cardiff Blues v Ospreys | L | 6-22 |
| United Rugby Championship | 2021/10/02 18:35 | Ospreys v Cardiff Blues | L | 18-14 |
| Pro 14 Rainbow Cup | 2021/04/24 16:15 | Ospreys v Cardiff Blues | L | 36-14 |
| Pro 14 Rugby | 2021/01/01 19:35 | Cardiff Blues v Ospreys | L | 3-17 |
| Pro 14 Rugby | 2020/08/30 16:00 | Cardiff Blues v Ospreys | W | 29-20 |
| Pro 14 Rugby | 2019/12/21 19:35 | Ospreys v Cardiff Blues | W | 16-19 |
| Pro 14 Rugby | 2019/04/27 16:15 | Cardiff Blues v Ospreys | L | 23-26 |
| Pro 14 Rugby | 2019/01/05 15:00 | Ospreys v Cardiff Blues | L | 20-11 |
| United Rugby Championship | 2018/04/28 16:35 | Cardiff Blues v Ospreys | L | 23-26 |
| Pro 14 Rugby | 2018/01/06 15:15 | Ospreys v Cardiff Blues | L | 29-28 |
| LV Cup | 2017/11/17 19:15 | Cardiff Blues v Ospreys | L | 16-26 |
| Pro 14 Rugby | 2017/04/15 13:45 | Cardiff Blues v Ospreys | W | 35-17 |
| LV Cup | 2016/11/18 19:15 | Cardiff Blues v Ospreys | L | 7-31 |
| Pro 14 Rugby | 2016/10/07 18:35 | Ospreys v Cardiff Blues | L | 46-24 |
| United Rugby Championship | 2016/04/30 13:30 | Cardiff Blues v Ospreys | L | 27-40 |
| United Rugby Championship | 2015/11/28 15:00 | Ospreys v Cardiff Blues | L | 13-6 |
| United Rugby Championship | 2015/04/25 13:30 | Cardiff Blues v Ospreys | L | 23-31 |
| United Rugby Championship | 2014/10/12 15:00 | Ospreys v Cardiff Blues | L | 26-15 |