Head to Head
| United Rugby Championship | 2023/12/02 15:00 | Cardiff Blues v Scarlets | W | 23-29 |
| United Rugby Championship | 2023/11/04 17:15 | Scarlets v Cardiff Blues | W | 31-25 |
| Friendlies | 2023/09/29 18:00 | Cardiff Blues v Scarlets | L | 21-12 |
| United Rugby Championship | 2023/01/07 17:15 | Cardiff Blues v Scarlets | W | 22-28 |
| United Rugby Championship | 2022/10/08 16:15 | Scarlets v Cardiff Blues | L | 10-16 |
| United Rugby Championship | 2022/04/09 14:10 | Cardiff Blues v Scarlets | W | 14-49 |
| United Rugby Championship | 2022/04/02 18:35 | Scarlets v Cardiff Blues | W | 35-20 |
| Pro 14 Rainbow Cup | 2021/05/15 14:00 | Scarlets v Cardiff Blues | L | 28-29 |
| Pro 14 Rugby | 2021/01/22 20:00 | Scarlets v Cardiff Blues | L | 10-13 |
| Pro 14 Rugby | 2021/01/09 19:35 | Cardiff Blues v Scarlets | L | 29-20 |
| Pro 14 Rugby | 2020/08/22 14:00 | Scarlets v Cardiff Blues | W | 32-12 |
| Pro 14 Rugby | 2020/01/03 19:35 | Cardiff Blues v Scarlets | W | 14-16 |
| Pro 14 Rugby | 2019/03/22 19:35 | Cardiff Blues v Scarlets | L | 41-17 |
| Pro 14 Rugby | 2018/12/29 17:15 | Scarlets v Cardiff Blues | L | 5-34 |
| Pro 14 Rugby | 2017/12/31 15:15 | Cardiff Blues v Scarlets | W | 11-14 |
| Pro 14 Rugby | 2017/10/28 18:35 | Scarlets v Cardiff Blues | W | 30-17 |
| Pro 14 Rugby | 2017/01/01 15:00 | Scarlets v Cardiff Blues | W | 15-10 |
| Pro 14 Rugby | 2016/10/28 18:35 | Cardiff Blues v Scarlets | W | 15-26 |
| United Rugby Championship | 2016/04/02 14:00 | Scarlets v Cardiff Blues | L | 22-28 |
| United Rugby Championship | 2016/01/01 17:00 | Cardiff Blues v Scarlets | L | 29-27 |
| United Rugby Championship | 2015/05/10 15:00 | Scarlets v Cardiff Blues | W | 16-6 |
| United Rugby Championship | 2014/12/19 19:35 | Cardiff Blues v Scarlets | L | 21-9 |
| LV Cup | 2014/11/14 19:30 | Cardiff Blues v Scarlets | L | 19-13 |