| 30. Round | 02/04/2023 | Athletic Club B | - | CA Osasuna B | 1:0 | ||||
| 31. Round | 09/04/2023 | CF La Nucía | - | Athletic Club B | 3:1 | ||||
| 32. Round | 16/04/2023 | Athletic Club B | - | CD Numancia | 0:1 | ||||
| 33. Round | 22/04/2023 | Real Unión | - | Athletic Club B | 2:1 | ||||
| 34. Round | 30/04/2023 | Athletic Club B | - | CD Castellón | 0:2 | ||||
| 35. Round | 07/05/2023 | UE Cornellà | - | Athletic Club B | 1:0 | ||||
| 36. Round | 13/05/2023 | Athletic Club B | - | CD Alcoyano | 1:3 |  |
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| 37. Round | 20/05/2023 | CD Eldense | - | Athletic Club B | 1:0 | ||||
| 38. Round | 27/05/2023 | Athletic Club B | - | SD Amorebieta | 0:0 |
Spain