| 27. Round | 09/03/2024 | Rayo Majadahonda | - | Real Unión | 1:1 | ||||
| 28. Round | 17/03/2024 | Real Unión | - | Real Sociedad B | 1:3 | ||||
| 34. Round | 27/04/2024 | CA Osasuna B | - | Real Unión | 2:1 |
| 27. Round | 09/03/2024 | Rayo Majadahonda | - | Real Unión | 1:1 | ||||
| 28. Round | 17/03/2024 | Real Unión | - | Real Sociedad B | 1:3 | ||||
| 34. Round | 27/04/2024 | CA Osasuna B | - | Real Unión | 2:1 |
| Carlos Beitia Cardos | |
| Born: | 15.02.2000 |
| Place of birth: |
Massanassa, 
Spain |
| Nationality: |
Spain
|
| Height: | 185 cm |
| Weight: | 72 kg |
| Position(s): | Central Midfielder Right Midfielder |
| Foot: | right |