| Japan NPB Reserve League | 2020/10/25 03:30 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 3-4 |
| Japan NPB Reserve League | 2020/10/24 03:30 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 0-5 |
| Japan NPB Reserve League | 2020/10/23 03:30 | Yakult Swallows Reserves v Seibu Lions Reserves | D | 0-0 |
| Japan NPB Reserve League | 2020/08/30 04:00 | Yakult Swallows Reserves v Seibu Lions Reserves | W | 7-2 |
| Japan NPB Reserve League | 2020/08/09 04:00 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 1-7 |
| Japan NPB Reserve League | 2020/08/07 04:00 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 0-5 |
| Japan NPB Reserve League | 2019/06/28 04:00 | Yakult Swallows Reserves v Seibu Lions Reserves | W | 4-3 |
| Japan NPB Reserve League | 2019/05/07 04:00 | Seibu Lions Reserves v Yakult Swallows Reserves | D | 5-5 |
| Japan NPB Reserve League | 2020/11/26 03:30 | Orix Buffaloes Reserves v Yakult Swallows Reserves | L | 5-3 |
| Japan NPB Reserve League | 2020/11/24 03:30 | Yakult Swallows Reserves v Chunichi Dragons Reserves | W | 8-0 |
| Japan NPB Reserve League | 2020/11/23 03:30 | Yokohama Bay Stars Reserves v Yakult Swallows Reserves | W | 1-5 |
| Japan NPB Reserve League | 2020/11/18 03:30 | Hanshin Tigers Reserves v Yakult Swallows Reserves | L | 7-1 |
| Japan NPB Reserve League | 2020/11/17 03:55 | Yakult Swallows Reserves v Orix Buffaloes Reserves | D | 0-0 |
| Japan NPB Reserve League | 2020/11/09 03:30 | Yakult Swallows Reserves v Orix Buffaloes Reserves | D | 0-0 |
| Japan NPB Reserve League | 2020/10/25 03:30 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 3-4 |
| Japan NPB Reserve League | 2020/10/24 03:30 | Yakult Swallows Reserves v Seibu Lions Reserves | L | 0-5 |
| Japan NPB Reserve League | 2021/04/22 04:00 | Seibu Lions Reserves v Yomiuri Giants Reserves | L | 0-14 |
| Japan NPB Reserve League | 2021/03/26 03:54 | Yokohama Bay Stars Reserves v Seibu Lions Reserves | W | 6-8 |
| Japan NPB Reserve League | 2021/03/24 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | W | 1-2 |
| Japan NPB Reserve League | 2021/03/23 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | W | 0-1 |
| Japan NPB Reserve League | 2020/11/29 02:00 | Seibu Lions Reserves v Hiroshima Carp Reserves | W | 2-0 |
| Japan NPB Reserve League | 2020/11/28 03:30 | Seibu Lions Reserves v Rakuten Eagles Reserves | D | 5-5 |
| Japan NPB Reserve League | 2020/11/27 03:30 | SoftBank Hawks Reserves v Seibu Lions Reserves | L | 3-2 |
| Japan NPB Reserve League | 2020/11/22 03:30 | Chiba Lotte Marines Reserves v Seibu Lions Reserves | L | 9-4 |