Head to Head
| England Development League 2 | 2023/02/21 12:00 | Cardiff U21 v Millwall U21 | W | 4-2 |
| England Development League 2 | 2022/10/31 14:00 | Millwall U21 v Cardiff U21 | L | 5-0 |
Home History
| Wales League Cup | 2023/07/21 18:30 | Cambrian United v Cardiff U21 | W | 5-6 |
| England Development League 2 | 2023/05/09 12:00 | Cardiff U21 v Crewe U21 | W | 4-2 |
| England Development League 2 | 2023/04/29 17:00 | Hull U21 v Cardiff U21 | L | 2-0 |
| England Development League 2 | 2023/04/25 13:00 | Cardiff U21 v Barnsley U21 | W | 3-1 |
| England Development League 2 | 2023/04/17 13:00 | Coventry U21 v Cardiff U21 | L | 3-0 |
| England Development League 2 | 2023/04/04 11:00 | Cardiff U21 v Sheffield Wed U21 | D | 1-1 |
| England Development League 2 | 2023/03/17 11:00 | Cardiff U21 v Ipswich U21 | W | 4-2 |
| England Development League 2 | 2023/03/14 12:30 | Ipswich U21 v Cardiff U21 | L | 4-1 |
Away History
| England Development League 2 | 2023/05/22 18:00 | Millwall U21 v Sheff Utd U21 | D | 1-1 |
| England Development League 2 | 2023/05/15 13:00 | Millwall U21 v Hull U21 | D | 3-3 |
| England Development League 2 | 2023/05/05 11:30 | Millwall U21 v Sheffield Wed U21 | W | 3-0 |
| England Development League 2 | 2023/04/28 11:00 | Wigan U21 v Millwall U21 | W | 2-3 |
| England Development League 2 | 2023/04/25 13:00 | Millwall U21 v Crewe U21 | W | 5-0 |
| England Development League 2 | 2023/04/18 12:00 | Sheff Utd U21 v Millwall U21 | D | 1-1 |
| England Development League 2 | 2023/04/11 11:00 | Millwall U21 v Swansea U21 | W | 3-1 |
| England Development League 2 | 2023/04/03 12:30 | Millwall U21 v Burnley U21 | W | 1-0 |