| Japan NPB Reserve League | 2021/04/22 04:00 | Seibu Lions Reserves v Yomiuri Giants Reserves | W | 0-14 |
| Japan NPB Reserve League | 2021/03/24 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | L | 1-2 |
| Japan NPB Reserve League | 2021/03/23 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | L | 0-1 |
| Japan NPB Reserve League | 2020/10/30 03:30 | Yomiuri Giants Reserves v Seibu Lions Reserves | D | 2-2 |
| Japan NPB Reserve League | 2020/10/04 03:30 | Yomiuri Giants Reserves v Seibu Lions Reserves | D | 0-0 |
| Japan NPB Reserve League | 2020/10/02 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | W | 6-4 |
| Japan NPB Reserve League | 2020/09/12 04:00 | Seibu Lions Reserves v Yomiuri Giants Reserves | D | 0-0 |
| Japan NPB Reserve League | 2020/09/11 04:00 | Seibu Lions Reserves v Yomiuri Giants Reserves | W | 5-7 |
| Japan NPB Reserve League | 2021/04/22 04:00 | Seibu Lions Reserves v Yomiuri Giants Reserves | W | 0-14 |
| Japan NPB Reserve League | 2021/04/08 04:00 | Chiba Lotte Marines Reserves v Yomiuri Giants Reserves | L | 9-0 |
| Japan NPB Reserve League | 2021/03/26 04:00 | Nipponham Fighters Reserves v Yomiuri Giants Reserves | L | 3-2 |
| Japan NPB Reserve League | 2021/03/24 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | L | 1-2 |
| Japan NPB Reserve League | 2021/03/23 04:00 | Yomiuri Giants Reserves v Seibu Lions Reserves | L | 0-1 |
| Japan NPB Reserve League | 2020/11/28 03:30 | Yomiuri Giants Reserves v SoftBank Hawks Reserves | L | 1-11 |
| Japan NPB Reserve League | 2020/11/22 03:30 | Yomiuri Giants Reserves v SoftBank Hawks Reserves | L | 1-2 |
| Japan NPB Reserve League | 2020/11/19 03:30 | Yomiuri Giants Reserves v Hiroshima Carp Reserves | L | 1-8 |
| 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 |