| Japan - NPB Reserve League | 2023/05/31 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 3-1 |
| Japan - NPB Reserve League | 2023/05/30 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 9-3 |
| Japan - NPB Reserve League | 2023/05/02 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | L | 11-3 |
| Japan - NPB Reserve League | 2023/04/07 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 4-3 |
| Japan - NPB Reserve League | 2022/08/26 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | L | 6-4 |
| Japan - NPB Reserve League | 2022/08/23 04:30 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | D | 5-5 |
| Japan - NPB Reserve League | 2022/05/12 04:00 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | W | 1-3 |
| Japan - NPB Reserve League | 2022/05/11 04:06 | Nipponham Fighters - Reserves v Seibu Lions - Reserves | L | 9-6 |
| Japan - NPB Reserve League | 2023/05/31 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 3-1 |
| Japan - NPB Reserve League | 2023/05/30 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | W | 9-3 |
| Japan - NPB Reserve League | 2023/05/25 04:00 | Yokohama Bay Stars - Reserves v Seibu Lions - Reserves | D | 4-4 |
| Japan - NPB Reserve League | 2023/05/24 04:30 | Yokohama Bay Stars - Reserves v Seibu Lions - Reserves | L | 2-0 |
| Japan - NPB Reserve League | 2023/05/23 09:00 | Yokohama Bay Stars - Reserves v Seibu Lions - Reserves | W | 0-1 |
| Japan - NPB Reserve League | 2023/05/17 04:00 | Yakult Swallows - Reserves v Seibu Lions - Reserves | L | 9-7 |
| Japan - NPB Reserve League | 2023/05/16 04:00 | Yakult Swallows - Reserves v Seibu Lions - Reserves | W | 7-10 |
| Japan - NPB Reserve League | 2023/05/12 04:00 | Yomiuri Giants - Reserves v Seibu Lions - Reserves | W | 3-4 |
| Japan - NPB Reserve League | 2023/05/31 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 3-1 |
| Japan - NPB Reserve League | 2023/05/30 04:00 | Seibu Lions - Reserves v Nipponham Fighters - Reserves | L | 9-3 |
| Japan - NPB Reserve League | 2023/05/25 04:00 | Rakuten Eagles - Reserves v Nipponham Fighters - Reserves | L | 10-2 |
| Japan - NPB Reserve League | 2023/05/24 04:00 | Rakuten Eagles - Reserves v Nipponham Fighters - Reserves | L | 3-2 |
| Japan - NPB Reserve League | 2023/05/12 04:00 | Chiba Lotte Marines - Reserves v Nipponham Fighters - Reserves | L | 5-0 |
| Japan - NPB Reserve League | 2023/05/11 04:00 | Yokohama Bay Stars - Reserves v Nipponham Fighters - Reserves | L | 3-0 |
| Japan - NPB Reserve League | 2023/05/10 04:00 | Yokohama Bay Stars - Reserves v Nipponham Fighters - Reserves | W | 3-4 |
| Japan - NPB Reserve League | 2023/05/09 04:00 | Yokohama Bay Stars - Reserves v Nipponham Fighters - Reserves | L | 1-0 |