Head to Head
| 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 |
Home History
| Welsh Premiership | 2018/05/12 13:30 | Cardiff v Ebbw Vale | L | 17-20 |
| Welsh Premiership | 2018/05/05 13:30 | Pontypridd v Cardiff | L | 18-8 |
| Welsh Premiership | 2018/04/18 18:15 | Cardiff v Llanelli | W | 45-20 |
| Welsh Premiership | 2018/04/14 13:30 | Cross Keys v Cardiff | L | 42-10 |
| Welsh Premiership | 2018/04/07 13:30 | Bedwas v Cardiff | L | 31-27 |
| Welsh Premiership | 2018/04/02 13:30 | Cardiff v RGC 1404 | L | 21-64 |
| Welsh Premiership | 2018/03/30 13:30 | Bargoed v Cardiff | W | 7-39 |
| Welsh Premiership | 2018/03/23 19:30 | Cardiff v Aberavon | W | 25-3 |
Away History
| Welsh Premiership | 2018/05/15 18:15 | Merthyr v Aberavon | W | 48-19 |
| Welsh Premiership | 2018/05/12 13:30 | Bargoed v Merthyr | W | 7-35 |
| Welsh Premiership | 2018/05/09 18:30 | Ebbw Vale v Merthyr | W | 14-17 |
| Welsh Premiership | 2018/05/05 15:00 | RGC 1404 v Merthyr | W | 13-20 |
| WRU Challenge Cup | 2018/04/29 16:35 | Newport v Merthyr | W | 7-41 |
| Welsh Premiership | 2018/04/21 13:30 | Merthyr v Carmarthen | L | 21-33 |
| Welsh Premiership | 2018/04/14 13:30 | Swansea v Merthyr | W | 10-45 |
| WRU Challenge Cup | 2018/04/07 16:15 | Ebbw Vale v Merthyr | W | 6-10 |