| Japonia - NPB Reserve League | 2021/08/03 04:00 | Seibu Lions - Rezerwa v Nipponham Fighters - Rezerwa | L | 5-6 |
| Japonia - NPB Reserve League | 2021/07/05 08:45 | Nipponham Fighters - Rezerwa v Seibu Lions - Rezerwa | W | 6-8 |
| Japonia - NPB Reserve League | 2021/06/17 04:00 | Nipponham Fighters - Rezerwa v Seibu Lions - Rezerwa | L | 2-1 |
| Japonia - NPB Reserve League | 2020/10/08 03:30 | Nipponham Fighters - Rezerwa v Seibu Lions - Rezerwa | D | 0-0 |
| Japonia - NPB Reserve League | 2020/10/07 03:30 | Nipponham Fighters - Rezerwa v Seibu Lions - Rezerwa | L | 11-5 |
| Japonia - NPB Reserve League | 2020/10/06 03:30 | Nipponham Fighters - Rezerwa v Seibu Lions - Rezerwa | L | 11-2 |
| Japonia - NPB Reserve League | 2020/09/02 03:56 | Nipponham Fighters - Rezerwa v Seibu Lions - Rezerwa | L | 6-5 |
| Japonia - NPB Reserve League | 2020/09/01 04:00 | Nipponham Fighters - Rezerwa v Seibu Lions - Rezerwa | L | 6-4 |
| Japonia - NPB Reserve League | 2021/08/19 04:00 | Yokohama Bay Stars - Rezerwa v Seibu Lions - Rezerwa | W | 8-9 |
| Japonia - NPB Reserve League | 2021/08/18 04:00 | Yokohama Bay Stars - Rezerwa v Seibu Lions - Rezerwa | L | 13-1 |
| Japonia - NPB Reserve League | 2021/08/17 04:00 | Yokohama Bay Stars - Rezerwa v Seibu Lions - Rezerwa | W | 0-2 |
| Japonia - NPB Reserve League | 2021/08/03 04:00 | Seibu Lions - Rezerwa v Nipponham Fighters - Rezerwa | L | 5-6 |
| Japonia - NPB Reserve League | 2021/08/01 06:00 | Chiba Lotte Marines - Rezerwa v Seibu Lions - Rezerwa | L | 4-3 |
| Japonia - NPB Reserve League | 2021/07/30 04:00 | Chiba Lotte Marines - Rezerwa v Seibu Lions - Rezerwa | D | 4-4 |
| Japonia - NPB Reserve League | 2021/07/29 04:00 | Yokohama Bay Stars - Rezerwa v Seibu Lions - Rezerwa | W | 6-10 |
| Japonia - NPB Reserve League | 2021/07/28 04:00 | Yokohama Bay Stars - Rezerwa v Seibu Lions - Rezerwa | L | 8-2 |
| Japonia - NPB Reserve League | 2021/08/17 04:00 | Orix Buffaloes - Rezerwa v Nipponham Fighters - Rezerwa | W | 1-6 |
| Japonia - NPB Reserve League | 2021/08/13 04:00 | Yomiuri Giants - Rezerwa v Nipponham Fighters - Rezerwa | W | 2-3 |
| Japonia - NPB Reserve League | 2021/08/03 04:00 | Seibu Lions - Rezerwa v Nipponham Fighters - Rezerwa | W | 5-6 |
| Japonia - NPB Reserve League | 2021/08/01 06:00 | Yakult Swallows - Rezerwa v Nipponham Fighters - Rezerwa | W | 6-9 |
| Japonia - NPB Reserve League | 2021/07/31 04:00 | Yakult Swallows - Rezerwa v Nipponham Fighters - Rezerwa | L | 6-1 |
| Japonia - NPB Reserve League | 2021/07/30 04:00 | Yakult Swallows - Rezerwa v Nipponham Fighters - Rezerwa | W | 2-6 |
| Japonia - NPB Reserve League | 2021/07/22 04:00 | Chiba Lotte Marines - Rezerwa v Nipponham Fighters - Rezerwa | L | 4-3 |
| Japonia - NPB Reserve League | 2021/07/21 04:00 | Chiba Lotte Marines - Rezerwa v Nipponham Fighters - Rezerwa | L | 5-4 |