Head to Head
| Pro 14 - Rainbow Cup | 2021/04/24 16:15 | Ospreys v Cardiff Blues | W | 36-14 |
| 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 |
Home History
| United Rugby Championship | 2021/09/26 13:00 | Newport Gwent Dragons v Ospreys | W | 23-27 |
| Pro 14 - Rainbow Cup | 2021/06/04 17:00 | Connacht v Ospreys | L | 26-19 |
| Pro 14 - Rainbow Cup | 2021/05/16 12:00 | Newport Gwent Dragons v Ospreys | W | 26-42 |
| Pro 14 - Rainbow Cup | 2021/05/08 18:35 | Scarlets v Ospreys | L | 22-6 |
| Pro 14 - Rainbow Cup | 2021/04/24 16:15 | Ospreys v Cardiff Blues | W | 36-14 |
| 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 |
Away History
| United Rugby Championship | 2021/09/24 18:35 | Cardiff Blues v Connacht | W | 33-21 |
| Pro 14 - Rainbow Cup | 2021/06/05 18:35 | Cardiff Blues v Zebre | W | 37-12 |
| Pro 14 - Rainbow Cup | 2021/05/28 18:35 | Munster v Cardiff Blues | L | 31-27 |
| Pro 14 - Rainbow Cup | 2021/05/15 14:00 | Scarlets v Cardiff Blues | W | 28-29 |
| Pro 14 - Rainbow Cup | 2021/05/09 12:00 | Cardiff Blues v Newport Gwent Dragons | W | 17-16 |
| Pro 14 - Rainbow Cup | 2021/04/24 16:15 | Ospreys v Cardiff Blues | L | 36-14 |
| 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 Edimburgo | W | 34-15 |