Trefelin (Premier League): every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2026-07-01 | Kane Owen | Penybont | Trefelin | Free |
| 2025-07-01 | Luke Bowen | Briton Ferry | Trefelin | Free |
| 2025-07-01 | Tyler Brock | Briton Ferry | Trefelin | Free |
| 2025-07-01 | Lewys Ware | Penybont | Trefelin | Free |
| 2025-07-01 | Kostya Georgievsky | Penybont | Trefelin | Free |
| 2024-08-30 | Alex Pennock | Briton Ferry | Trefelin | Free |
| 2024-07-12 | Shaun MacDonald | Penybont | Trefelin | Free |
| 2023-08-19 | Player | TBC | Trefelin | Free |
| 2022-02-28 | Player | Trefelin | Moreland City | Free |