Head to Head
| Welsh Premiership | 2018/09/16 13:30 | Llanelli v Merthyr | W | 7-26 |
| Welsh Premiership | 2018/03/17 12:30 | Merthyr v Llanelli | W | 44-43 |
| Welsh Premiership | 2016/10/29 13:30 | Llanelli v Merthyr | W | 14-35 |
| WRU Challenge Cup | 2016/02/27 14:30 | Llanelli v Merthyr | W | 14-17 |
Home History
| WRU Challenge Cup | 2019/01/04 19:30 | Aberavon v Merthyr | W | 10-15 |
| Welsh Premiership | 2018/12/29 14:30 | Bargoed v Merthyr | W | 17-38 |
| Welsh Premiership | 2018/12/22 14:30 | Bedwas v Merthyr | W | 20-26 |
| Welsh Premiership | 2018/12/14 19:15 | Merthyr v Cardiff | L | 28-34 |
| Welsh Premiership | 2018/12/07 19:10 | Merthyr v Carmarthen | W | 30-5 |
| Welsh Premiership | 2018/12/01 14:30 | Merthyr v Newport | L | 28-30 |
| Welsh Premiership | 2018/11/23 19:30 | Merthyr v Llandovery | W | 34-24 |
| Welsh Premiership | 2018/11/16 19:15 | Merthyr v Cross Keys | W | 52-28 |
Away History
| WRU Challenge Cup | 2019/01/05 14:30 | Ystrad Rhondda RFC v Llanelli | W | 18-32 |
| Welsh Premiership | 2018/12/29 14:30 | Swansea v Llanelli | L | 38-10 |
| Welsh Premiership | 2018/12/22 14:30 | Llanelli v Pontypridd | L | 3-22 |
| Welsh Premiership | 2018/12/15 14:30 | Ebbw Vale v Llanelli | L | 20-7 |
| Welsh Premiership | 2018/12/07 19:30 | Neath v Llanelli | W | 12-69 |
| Welsh Premiership | 2018/12/01 14:30 | Llanelli v Bridgend Ravens | W | 35-3 |
| Welsh Premiership | 2018/11/24 13:00 | RGC 1404 v Llanelli | L | 39-19 |
| Welsh Premiership | 2018/11/16 19:15 | Aberavon v Llanelli | L | 54-29 |