Head to Head
| Welsh Premiership | 2023/01/07 14:30 | Merthyr v Cardiff | W | 16-22 |
| Welsh Premiership | 2022/04/28 18:30 | Cardiff v Merthyr | W | 31-12 |
| Welsh Premiership | 2019/12/14 14:30 | Cardiff v Merthyr | W | 20-3 |
| WRU Challenge Cup | 2019/04/28 16:35 | Merthyr v Cardiff | W | 19-25 |
| Welsh Premiership | 2018/12/14 19:15 | Merthyr v Cardiff | W | 28-34 |
| Welsh Premiership | 2018/09/01 13:30 | Cardiff v Merthyr | L | 18-24 |
| Welsh Premiership | 2018/02/09 19:15 | Cardiff v Merthyr | L | 20-25 |
| WRU Challenge Cup | 2018/01/27 14:30 | Cardiff v Merthyr | L | 12-37 |
| Welsh Premiership | 2017/11/04 14:30 | Merthyr v Cardiff | L | 27-23 |
| Welsh Premiership | 2017/09/02 13:30 | Cardiff v Merthyr | W | 24-17 |
| Welsh Premiership | 2016/09/10 13:30 | Merthyr v Cardiff | L | 24-18 |