Head to Head
| Japan NPB | 2020/11/03 05:00 | Nippon Ham Fighters v Seibu Lions | L | 4-5 |
| Japan NPB | 2020/11/02 09:00 | Nippon Ham Fighters v Seibu Lions | L | 0-4 |
| Japan NPB | 2020/10/15 09:00 | Seibu Lions v Nippon Ham Fighters | W | 3-8 |
| Japan NPB | 2020/10/14 09:00 | Seibu Lions v Nippon Ham Fighters | W | 2-7 |
| Japan NPB | 2020/10/13 09:00 | Seibu Lions v Nippon Ham Fighters | L | 7-0 |
| Japan NPB | 2020/09/24 09:00 | Nippon Ham Fighters v Seibu Lions | W | 12-2 |
| Japan NPB | 2020/09/23 09:00 | Nippon Ham Fighters v Seibu Lions | L | 5-6 |
| Japan NPB | 2020/09/22 09:00 | Nippon Ham Fighters v Seibu Lions | W | 5-1 |
Home History
| Japan NPB | 2020/11/03 05:00 | Nippon Ham Fighters v Seibu Lions | L | 4-5 |
| Japan NPB | 2020/11/02 09:00 | Nippon Ham Fighters v Seibu Lions | L | 0-4 |
| Japan NPB | 2020/11/01 04:00 | Orix Buffaloes v Nippon Ham Fighters | W | 1-7 |
| Japan NPB | 2020/10/31 05:00 | Orix Buffaloes v Nippon Ham Fighters | W | 1-6 |
| Japan NPB | 2020/10/30 09:00 | Orix Buffaloes v Nippon Ham Fighters | L | 3-2 |
| Japan NPB | 2020/10/29 09:00 | Orix Buffaloes v Nippon Ham Fighters | W | 3-4 |
| Japan NPB | 2020/10/28 09:00 | Nippon Ham Fighters v Orix Buffaloes | W | 1-0 |
| Japan NPB | 2020/10/27 09:00 | Nippon Ham Fighters v Orix Buffaloes | W | 5-3 |
Away History
| Japan NPB | 2020/11/03 05:00 | Nippon Ham Fighters v Seibu Lions | W | 4-5 |
| Japan NPB | 2020/11/02 09:00 | Nippon Ham Fighters v Seibu Lions | W | 0-4 |
| 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 | 2020/10/29 09:00 | Rakuten Eagles v Seibu Lions | L | 13-5 |
| Japan NPB | 2020/10/28 09:00 | Rakuten Eagles v Seibu Lions | W | 3-4 |
| Japan NPB | 2020/10/27 09:00 | Rakuten Eagles v Seibu Lions | W | 3-4 |