| 2023-02-05 12:00:215 de febrero de 2023 |   NÁSTIC TARRAGONA vs ATHLETIC CLUB B | 12:00:2112:00 | Primera RFEF | 2022-2023 | Nou Estadi Costa Daurada |
| 2023-02-12 12:00:1112 de febrero de 2023 |  CF INTERCITY vs ATHLETIC CLUB B | 12:00:1112:00 | Primera RFEF | 2022-2023 | Campo Municipal Antonio Solana |
| 2023-02-19 12:00:3519 de febrero de 2023 |  ATHLETIC CLUB B vs BARCELONA B | 12:00:3512:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
| 2023-02-26 12:00:4026 de febrero de 2023 |  REAL SOCIEDAD B vs ATHLETIC CLUB B | 12:00:4012:00 | Primera RFEF | 2022-2023 | Zubieta-Real Sociedad |
| 2023-03-05 12:00:175 de marzo de 2023 |  ATHLETIC CLUB B vs CD CALAHORRA | 12:00:1712:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
| 2023-03-12 12:00:2812 de marzo de 2023 |  SD LOGROÑÉS vs ATHLETIC CLUB B | 12:00:2812:00 | Primera RFEF | 2022-2023 | Estadio Municipal de Las Gaunas |
| 2023-03-19 12:00:1919 de marzo de 2023 |  ATHLETIC CLUB B vs CE SABADELL | 12:00:1912:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
| 2023-03-26 12:00:3026 de marzo de 2023 |  AT BALEARES vs ATHLETIC CLUB B | 12:00:3012:00 | Primera RFEF | 2022-2023 | Estadio Balear |
| 2023-04-02 12:00:252 de abril de 2023 |  ATHLETIC CLUB B vs OSASUNA B | 12:00:2512:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
| 2023-04-09 12:00:369 de abril de 2023 |  CF LA NUCÍA vs ATHLETIC CLUB B | 12:00:3612:00 | Primera RFEF | 2022-2023 | Estadio Camilo Cano La Nucía |
| 2023-04-16 12:00:4316 de abril de 2023 |  ATHLETIC CLUB B vs CD NUMANCIA | 12:00:4312:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
| 2023-04-23 12:00:0523 de abril de 2023 |  REAL UNIÓN vs ATHLETIC CLUB B | 12:00:0512:00 | Primera RFEF | 2022-2023 | Stadium Gal |
| 2023-04-30 12:00:2530 de abril de 2023 |  ATHLETIC CLUB B vs CD CASTELLÓN | 12:00:2512:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
| 2023-05-07 12:00:377 de mayo de 2023 |  UE CORNELLÁ vs ATHLETIC CLUB B | 12:00:3712:00 | Primera RFEF | 2022-2023 | Municipal de Cornellá |
| 2023-05-14 12:00:0914 de mayo de 2023 |  ATHLETIC CLUB B vs CD ALCOYANO | 12:00:0912:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
| 2023-05-21 12:00:3221 de mayo de 2023 |  CD ELDENSE vs ATHLETIC CLUB B | 12:00:3212:00 | Primera RFEF | 2022-2023 | Estadio Nuevo Pepico Amat |
| 2023-05-28 12:00:3328 de mayo de 2023 |  ATHLETIC CLUB B vs SD AMOREBIETA | 12:00:3312:00 | Primera RFEF | 2022-2023 | Lezama-Athletic Club |
