Head to Head
| Pro 14 Rugby | 2021/01/01 19:35 | Cardiff Blues v Ospreys | W | 3-17 |
| Pro 14 Rugby | 2020/08/30 16:00 | Cardiff Blues v Ospreys | L | 29-20 |
| Pro 14 Rugby | 2019/12/21 19:35 | Ospreys v Cardiff Blues | L | 16-19 |
| Pro 14 Rugby | 2019/04/27 16:15 | Cardiff Blues v Ospreys | W | 23-26 |
| Pro 14 Rugby | 2019/01/05 15:00 | Ospreys v Cardiff Blues | W | 20-11 |
| United Rugby Championship | 2018/04/28 16:35 | Cardiff Blues v Ospreys | W | 23-26 |
| Pro 14 Rugby | 2018/01/06 15:15 | Ospreys v Cardiff Blues | W | 29-28 |
| LV Cup | 2017/11/17 19:15 | Cardiff Blues v Ospreys | W | 16-26 |
Home History
| European Rugby Challenge Cup | 2021/04/03 14:00 | Ospreys v Newcastle Falcons | L | 24-28 |
| Pro 14 Rugby | 2021/03/19 20:15 | Leinster v Ospreys | W | 19-24 |
| Pro 14 Rugby | 2021/03/12 20:00 | Glasgow v Ospreys | L | 30-25 |
| Pro 14 Rugby | 2021/03/06 19:35 | Ospreys v Newport Gwent Dragons | L | 20-31 |
| Pro 14 Rugby | 2021/02/26 20:00 | Ulster v Ospreys | L | 21-7 |
| Pro 14 Rugby | 2021/02/20 17:15 | Ospreys v Zebre | W | 10-0 |
| Pro 14 Rugby | 2021/01/24 15:00 | Connacht v Ospreys | W | 20-26 |
| Pro 14 Rugby | 2021/01/09 17:15 | Newport Gwent Dragons v Ospreys | W | 20-28 |
Away History
| European Rugby Challenge Cup | 2021/04/02 16:30 | London Irish v Cardiff Blues | L | 41-35 |
| Pro 14 Rugby | 2021/03/22 20:00 | Cardiff Blues v Edinburgh | W | 34-15 |
| Pro 14 Rugby | 2021/03/14 13:00 | Benetton Treviso v Cardiff Blues | W | 14-29 |
| Pro 14 Rugby | 2021/02/26 20:00 | Cardiff Blues v Munster | L | 11-20 |
| Pro 14 Rugby | 2021/02/20 19:35 | Connacht v Cardiff Blues | L | 32-17 |
| Pro 14 Rugby | 2021/01/22 20:00 | Scarlets v Cardiff Blues | W | 10-13 |
| Pro 14 Rugby | 2021/01/09 19:35 | Cardiff Blues v Scarlets | W | 29-20 |
| Pro 14 Rugby | 2021/01/01 19:35 | Cardiff Blues v Ospreys | L | 3-17 |