| Japan NPB Reserve League | 2023/07/12 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 1-2 |
| Japan NPB Reserve League | 2023/07/11 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 3-5 |
| 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 | W | 2-0 |
| Japan NPB Reserve League | 2023/05/23 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 0-1 |
| Japan NPB Reserve League | 2022/09/15 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 2-4 |
| Japan NPB Reserve League | 2021/08/19 04:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 8-9 |
| Japan NPB Reserve League | 2021/08/18 04:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | W | 13-1 |
| Japan NPB Reserve League | 2023/07/12 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 1-2 |
| Japan NPB Reserve League | 2023/07/11 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 3-5 |
| Japan NPB Reserve League | 2023/06/25 04:00 | Yokohama Bay Stars Reserves v Nipponham Fighters Reserves | W | 7-3 |
| Japan NPB Reserve League | 2023/06/24 04:00 | Yokohama Bay Stars Reserves v Nipponham Fighters Reserves | W | 12-1 |
| Japan NPB Reserve League | 2023/06/23 04:00 | Yokohama Bay Stars Reserves v Nipponham Fighters Reserves | D | 3-3 |
| 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 | W | 2-0 |
| Japan NPB Reserve League | 2023/05/23 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | L | 0-1 |
| Japan NPB Reserve League | 2023/07/12 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | W | 1-2 |
| Japan NPB Reserve League | 2023/07/11 09:00 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | W | 3-5 |
| Japan NPB Reserve League | 2023/07/02 04:00 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 2-0 |
| Japan NPB Reserve League | 2023/06/25 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | W | 2-3 |
| Japan NPB Reserve League | 2023/06/24 04:30 | Yomiuri Giants Reserves v Seibu Lions Reserves | W | 1-6 |
| Japan NPB Reserve League | 2023/06/23 09:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | L | 2-1 |
| Japan NPB Reserve League | 2023/06/22 04:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | L | 12-3 |
| Japan NPB Reserve League | 2023/06/21 04:00 | Nipponham Fighters Reserves v Seibu Lions Reserves | W | 2-17 |