| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2025/2026 | Wrexham | FA Cup | 3 | 0 | 0 | 0 | 0 | 7.5 |
| 2025/2026 | Wrexham | EFL Cup | 3 | 0 | 0 | 0 | 0 | 7.0 |
| 2024 | Los Angeles FC | US Open Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2023/2024 | Middlesbrough | EFL Cup | 2 | 0 | 0 | 0 | 0 | 7.1 |
| 2023 | DC United | US Open Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2022/2023 | Nottingham | FA Cup | 1 | 0 | 0 | 0 | 0 | 6.7 |
| 2022/2023 | Nottingham | EFL Cup | 3 | 0 | 0 | 0 | 0 | 6.4 |
| 2021/2022 | Huddersfield | FA Cup | 2 | 0 | 0 | 0 | 0 | – |
| 2021/2022 | Huddersfield | EFL Cup | 2 | 0 | 0 | 1 | 0 | 7.1 |
| 2019/2020 | Huddersfield | FA Cup | 1 | 0 | 0 | 0 | 0 | 6.3 |
| 2018/2019 | Bradford City | FA Cup | 4 | 0 | 0 | 0 | 0 | – |
| 2018/2019 | Bradford City | EFL Trophy | 2 | 0 | 0 | 2 | 0 | – |
| 2016/2017 | Huddersfield U23 | Premier League Cup | 1 | 1 | 0 | 0 | 0 | – |
| Total | 28 | 1 | 0 | 3 | 0 | – | ||
| Fecha | Desde | Hacia | Tipo | |
|---|---|---|---|---|
| - | Nottingham | Wrexham | Transfer | |
| - | Swansea | Nottingham | Return from loan | |
| 02 mar 2025 | Nottingham | Swansea | Loan | |
| - | Los Angeles FC | Nottingham | Return from loan | |
| - | Nottingham | Los Angeles FC | Loan | |
| - | Middlesbrough | Nottingham | Return from loan | |
| - | Nottingham | Middlesbrough | Loan | |
| - | DC United | Nottingham | Return from loan | |
| - | Nottingham | DC United | Loan | |
| - | Huddersfield | Nottingham | Transfer | |
| - | Bradford City | Huddersfield | Return from loan | |
| - | Huddersfield | Bradford City | Loan |
L. O'Brien career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.