| Temporada | Equipo | Competición | PJ | G | A | Nota | ||
|---|---|---|---|---|---|---|---|---|
| 2025/2026 | Bristol City | Championship | 2 | 0 | 0 | 0 | 0 | 6.5 |
| 2024/2025 | Bristol City | Championship | 25 | 0 | 4 | 6 | 1 | 7.0 |
| 2023/2024 | Bristol City | Championship | 40 | 0 | 5 | 8 | 0 | 6.9 |
| 2022/2023 | Bristol City | Championship | 33 | 2 | 2 | 9 | 0 | 6.9 |
| 2021/2022 | Bristol City | Championship | 22 | 0 | 2 | 8 | 0 | 6.8 |
| 2020/2021 | Bristol City | Championship | 1 | 0 | 0 | 0 | 0 | 5.9 |
| 2019/2020 | Wigan | Championship | 38 | 1 | 3 | 15 | 1 | 6.9 |
| 2018/2019 | Bolton | Championship | 30 | 0 | 2 | 7 | 0 | 6.8 |
| 2018/2019 | Everton U23 | Premier League 2 | 2 | 0 | 0 | 1 | 0 | – |
| 2017/2018 | Barnsley | Championship | 34 | 1 | 0 | 10 | 0 | 6.9 |
| 2016/2017 | Everton U23 | Premier League 2 | 7 | 0 | 0 | 1 | 0 | – |
| 2015/2016 | Everton U21 | Premier League U21 | 1 | 1 | 0 | 0 | 0 | – |
| 2014/2015 | Everton U21 | Premier League U21 | 2 | 2 | 0 | 0 | 0 | – |
| Total | 237 | 7 | 18 | 65 | 2 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| - | Wigan | Bristol City | ||
| - | Everton | Wigan | ||
| - | Bolton | Everton | Return from loan | |
| - | Everton | Bolton | Loan | |
| - | Barnsley | Everton | Return from loan | |
| - | Everton | Barnsley | Loan |
J. Williams career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.