Head to Head
| Japan NPB | 2020/11/09 09:00 | Seibu Lions v Softbank Hawks | L | 2-6 |
| Japan NPB | 2020/11/01 04:00 | Softbank Hawks v Seibu Lions | W | 1-3 |
| Japan NPB | 2020/10/31 05:00 | Softbank Hawks v Seibu Lions | L | 11-2 |
| Japan NPB | 2020/10/30 09:00 | Softbank Hawks v Seibu Lions | L | 4-3 |
| Japan NPB | 2020/10/25 04:00 | Seibu Lions v Softbank Hawks | L | 2-7 |
| Japan NPB | 2020/10/24 05:00 | Seibu Lions v Softbank Hawks | W | 4-1 |
| Japan NPB | 2020/10/23 09:00 | Seibu Lions v Softbank Hawks | L | 1-8 |
| Japan NPB | 2020/10/08 09:00 | Softbank Hawks v Seibu Lions | D | 4-4 |
Home History
| Japan NPB | 2021/03/31 09:00 | Seibu Lions v Nippon Ham Fighters | D | 1-1 |
| Japan NPB | 2021/03/30 09:30 | Seibu Lions v Nippon Ham Fighters | W | 11-4 |
| Japan NPB | 2021/03/28 04:00 | Orix Buffaloes v Seibu Lions | W | 1-5 |
| Japan NPB | 2021/03/27 05:00 | Orix Buffaloes v Seibu Lions | L | 3-2 |
| Japan NPB | 2021/03/26 08:45 | Orix Buffaloes v Seibu Lions | W | 3-4 |
| Japan NPB Exhibition | 2021/03/21 04:00 | Yakult Swallows v Seibu Lions | W | 6-8 |
| Japan NPB Exhibition | 2021/03/20 04:00 | Yakult Swallows v Seibu Lions | W | 1-2 |
| Japan NPB Exhibition | 2021/03/19 04:00 | Yokohama Bay Stars v Seibu Lions | L | 5-1 |
Away History
| Japan NPB | 2021/04/01 09:00 | Softbank Hawks v Orix Buffaloes | L | 0-2 |
| Japan NPB | 2021/03/31 09:00 | Softbank Hawks v Orix Buffaloes | L | 2-7 |
| Japan NPB | 2021/03/30 09:00 | Softbank Hawks v Orix Buffaloes | W | 3-1 |
| Japan NPB | 2021/03/28 04:00 | Lotte Marines v Softbank Hawks | W | 5-6 |
| Japan NPB | 2021/03/27 04:00 | Lotte Marines v Softbank Hawks | W | 2-3 |
| Japan NPB | 2021/03/26 09:30 | Lotte Marines v Softbank Hawks | W | 2-8 |
| Japan NPB Exhibition | 2021/03/21 05:00 | Softbank Hawks v Hiroshima Carp | L | 1-2 |
| Japan NPB Exhibition | 2021/03/20 04:00 | Hiroshima Carp v Softbank Hawks | W | 1-2 |