| Temporada | Equipo | Competición | PJ | G | A | Nota | ||
|---|---|---|---|---|---|---|---|---|
| 2025/2026 | Montrose | Scottish Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2025/2026 | Montrose | Challenge Cup | 1 | 1 | 0 | 0 | 0 | – |
| 2024/2025 | Montrose | League Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2023/2024 | Montrose | Scottish Cup | 2 | 0 | 1 | 0 | 0 | – |
| 2023/2024 | Montrose | League Cup | 4 | 0 | 0 | 1 | 0 | – |
| 2022/2023 | Falkirk | Scottish Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2022/2023 | Falkirk | League Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2021/2022 | Falkirk | Scottish Cup | 1 | 0 | 1 | 0 | 0 | – |
| 2021/2022 | Falkirk | League Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2020/2021 | Partick Thistle | Scottish Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2020/2021 | Partick Thistle | League Cup | 3 | 0 | 0 | 0 | 0 | – |
| 2019/2020 | Partick Thistle | Scottish Cup | 1 | 0 | 1 | 0 | 0 | – |
| 2019/2020 | Partick Thistle | Challenge Cup | 3 | 0 | 2 | 0 | 0 | – |
| 2019/2020 | Partick Thistle | League Cup | 6 | 1 | 0 | 0 | 0 | – |
| 2018/2019 | Dunfermline | League Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2017/2018 | Dunfermline | Scottish Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2017/2018 | Dunfermline | League Cup | 5 | 0 | 0 | 0 | 0 | – |
| 2016/2017 | Dunfermline | League Cup | 3 | 0 | 0 | 0 | 0 | – |
| Total | 46 | 2 | 5 | 1 | 0 | – | ||
| Fecha | Desde | Hacia | Tipo | |
|---|---|---|---|---|
| 07 ene 2023 | Falkirk | Montrose | Free agent | |
| 07 ene 2021 | Partick Thistle | Falkirk | Free agent | |
| 07 ene 2019 | Dunfermline | Partick Thistle | Free agent |
R. Williamson career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.