| Temporada | Equipo | Competición | PJ | G | A | Nota | ||
|---|---|---|---|---|---|---|---|---|
| 2025/2026 | Sunderland | FA Cup | 3 | 0 | 0 | 1 | 0 | 7.7 |
| 2024/2025 | Sunderland | FA Cup | 1 | 0 | 0 | 0 | 0 | 7.2 |
| 2023/2024 | Sunderland | FA Cup | 1 | 0 | 0 | 1 | 0 | 6.2 |
| 2022/2023 | Sunderland | FA Cup | 1 | 0 | 0 | 0 | 0 | 6.7 |
| 2022/2023 | Sunderland | EFL Cup | 1 | 0 | 0 | 0 | 0 | 7.9 |
| 2021/2022 | Sunderland | FA Cup | 1 | 0 | 0 | 0 | 0 | – |
| 2021/2022 | Sunderland | EFL Trophy | 1 | 0 | 0 | 0 | 0 | 7.3 |
| 2021/2022 | Sunderland | EFL Cup | 3 | 1 | 0 | 2 | 0 | 7.1 |
| 2020/2021 | Sunderland | EFL Trophy | 4 | 0 | 0 | 1 | 0 | 7.3 |
| 2020/2021 | Sunderland | EFL Cup | 1 | 0 | 0 | 0 | 0 | 7.2 |
| 2019/2020 | Sunderland | FA Cup | 2 | 0 | 0 | 2 | 0 | – |
| 2019/2020 | Sunderland | EFL Trophy | 2 | 0 | 0 | 0 | 1 | – |
| 2019/2020 | Sunderland | EFL Cup | 4 | 0 | 2 | 0 | 0 | 6.8 |
| 2018/2019 | Sunderland | FA Cup | 1 | 0 | 0 | 0 | 0 | 5.9 |
| 2018/2019 | Sunderland | EFL Trophy | 8 | 0 | 0 | 1 | 0 | – |
| 2018/2019 | Sunderland | EFL Cup | 1 | 0 | 0 | 1 | 0 | 6.3 |
| 2017/2018 | Wycombe | FA Cup | 1 | 0 | 0 | 0 | 0 | 6.7 |
| 2017/2018 | Wycombe | EFL Trophy | 3 | 0 | 0 | 0 | 0 | – |
| 2016/2017 | Wycombe | EFL Trophy | 3 | 0 | 0 | 1 | 0 | – |
| 2016/2017 | Wycombe | FA Cup | 1 | 0 | 0 | 1 | 0 | 6.5 |
| 2015/2016 | Wycombe | FA Cup | 3 | 0 | 0 | 1 | 0 | – |
| 2015/2016 | Wycombe | Johnstone's Paint Trophy | 1 | 0 | 0 | 0 | 0 | – |
| Total | 47 | 1 | 2 | 12 | 1 | – | ||
| Fecha | Desde | Hacia | Tipo | |
|---|---|---|---|---|
| - | Wycombe | Sunderland | ||
| - | Watford | Wycombe | Free agent | |
| - | Wealdstone | Watford | Return from loan | |
| - | Watford | Wealdstone | Loan | |
| - | Wealdstone | Watford | Return from loan | |
| - | Watford | Wealdstone | Loan |
L. O'Nien career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.