| Japan NPB Reserve League | 2025/08/13 03:00 | Oisix Niigata v Seibu Lions Reserves | L | 5-7 |
| Japan NPB Reserve League | 2025/08/12 04:00 | Oisix Niigata v Seibu Lions Reserves | L | 1-5 |
| Japan NPB Reserve League | 2025/05/04 04:00 | Oisix Niigata v Seibu Lions Reserves | L | 5-9 |
| Japan NPB Reserve League | 2025/05/03 04:00 | Oisix Niigata v Seibu Lions Reserves | W | 5-3 |
| Japan NPB Reserve League | 2024/08/18 08:00 | Oisix Niigata v Seibu Lions Reserves | L | 1-2 |
| Japan NPB Reserve League | 2024/08/17 09:00 | Oisix Niigata v Seibu Lions Reserves | L | 3-9 |
| Japan NPB Reserve League | 2024/07/14 04:00 | Oisix Niigata v Seibu Lions Reserves | L | 3-6 |
| Japan NPB Reserve League | 2024/07/13 04:00 | Oisix Niigata v Seibu Lions Reserves | L | 4-8 |
| Japan NPB Reserve League | 2025/09/09 04:00 | Oisix Niigata v Yomiuri Giants Reserves | L | 4-5 |
| Japan NPB Reserve League | 2025/08/13 03:00 | Oisix Niigata v Seibu Lions Reserves | L | 5-7 |
| Japan NPB Reserve League | 2025/08/12 04:00 | Oisix Niigata v Seibu Lions Reserves | L | 1-5 |
| Japan NPB Reserve League | 2025/07/03 04:00 | Oisix Niigata v Nipponham Fighters Reserves | L | 2-3 |
| Japan NPB Reserve League | 2025/07/02 04:00 | Oisix Niigata v Nipponham Fighters Reserves | L | 1-6 |
| Japan NPB Reserve League | 2025/07/01 04:00 | Oisix Niigata v Nipponham Fighters Reserves | W | 10-5 |
| Japan NPB Reserve League | 2025/05/16 04:00 | Oisix Niigata v Yomiuri Giants Reserves | L | 1-6 |
| Japan NPB Reserve League | 2025/05/04 04:00 | Oisix Niigata v Seibu Lions Reserves | L | 5-9 |
| Japan NPB Reserve League | 2025/09/09 04:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | W | 2-4 |
| Japan NPB Reserve League | 2025/09/03 04:00 | Chiba Lotte Marines Reserves v Seibu Lions Reserves | W | 2-3 |
| Japan NPB Reserve League | 2025/09/02 04:00 | Chiba Lotte Marines Reserves v Seibu Lions Reserves | W | 0-9 |
| Japan NPB Reserve League | 2025/08/31 04:30 | Rakuten Eagles Reserves v Seibu Lions Reserves | L | 2-1 |
| Japan NPB Reserve League | 2025/08/28 04:00 | Seibu Lions Reserves v Nipponham Fighters Reserves | L | 3-6 |
| Japan NPB Reserve League | 2025/08/27 04:00 | Seibu Lions Reserves v Nipponham Fighters Reserves | L | 2-3 |
| Japan NPB Reserve League | 2025/08/26 04:00 | Seibu Lions Reserves v Nipponham Fighters Reserves | W | 7-4 |
| Japan NPB Reserve League | 2025/08/24 09:00 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 3-1 |