| Middlesbrough FC [U18] | Season 2023/2024 | 40 Players/Coaches |
| Middlesbrough FC [U18] | Season 2022/2023 | 38 Players/Coaches |
| Middlesbrough FC [U18] | Season 2021/2022 | 37 Players/Coaches |
| Middlesbrough FC [U18] | Season 2020/2021 | 40 Players/Coaches |
| Middlesbrough FC [U18] | Season 2019/2020 | 37 Players/Coaches |
| Middlesbrough FC [U18] | Season 2018/2019 | 34 Players/Coaches |
| Middlesbrough FC [U18] | Season 2017/2018 | 23 Players/Coaches |
| Middlesbrough FC [U18] | Season 2016/2017 | 9 Players/Coaches |
| Middlesbrough FC [U18] | Season 2015/2016 | 4 Players/Coaches |
| Middlesbrough FC [U18] | Season 2014/2015 | 4 Players/Coaches |
| Middlesbrough FC [U18] | Season 2013/2014 | 2 Players/Coaches |
| Middlesbrough FC [U18] | Season 2007/2008 | 1 Players/Coaches |
| Middlesbrough FC [U18] | Season 2003/2004 | 2 Players/Coaches |
| Middlesbrough FC [U18] | Season 2002/2003 | 1 Players/Coaches |
| Middlesbrough FC [U18] | Season 2001/2002 | 2 Players/Coaches |
| Middlesbrough FC [U18] | Season 2000/2001 | 1 Players/Coaches |
| Middlesbrough FC [U18] | Season 1990/1991 | 1 Players/Coaches |
![Middlesbrough FC [U18]](https://s.hs-data.com/bilder/wappen/mittel/28109.gif?fallback=png "Middlesbrough FC [U18]")
England 
![Middlesbrough FC [U16]](https://s.hs-data.com/bilder/wappen/mini/41296.gif?fallback=png "Middlesbrough FC [U16]"){kind=small}
![Middlesbrough FC [Youth]](https://s.hs-data.com/bilder/wappen/mini/22403.gif?fallback=png "Middlesbrough FC [Youth]"){kind=small}
![Middlesbrough FC [Youth B]](https://s.hs-data.com/bilder/wappen/mini/25283.gif?fallback=png "Middlesbrough FC [Youth B]"){kind=small}