Head to Head
| Japan NPB | 2021/05/21 08:45 | Nippon Ham Fighters v Seibu Lions | L | 1-7 |
| Japan NPB | 2021/05/01 05:00 | Seibu Lions v Nippon Ham Fighters | W | 4-5 |
| Japan NPB | 2021/04/30 09:00 | Seibu Lions v Nippon Ham Fighters | L | 5-1 |
| Japan NPB | 2021/04/14 08:45 | Nippon Ham Fighters v Seibu Lions | L | 1-2 |
| Japan NPB | 2021/04/13 08:45 | Nippon Ham Fighters v Seibu Lions | W | 3-2 |
| 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 | L | 11-4 |
| Japan NPB Exhibition | 2021/03/04 09:00 | Seibu Lions v Nippon Ham Fighters | L | 6-1 |
Home History
| Japan NPB | 2021/05/21 08:45 | Nippon Ham Fighters v Seibu Lions | L | 1-7 |
| Japan NPB | 2021/05/20 09:00 | Nippon Ham Fighters v Rakuten Eagles | W | 4-1 |
| Japan NPB | 2021/05/19 09:00 | Nippon Ham Fighters v Rakuten Eagles | L | 2-3 |
| Japan NPB | 2021/05/18 09:00 | Nippon Ham Fighters v Rakuten Eagles | L | 2-3 |
| Japan NPB | 2021/05/16 05:00 | Softbank Hawks v Nippon Ham Fighters | D | 2-2 |
| Japan NPB | 2021/05/15 05:00 | Softbank Hawks v Nippon Ham Fighters | L | 7-3 |
| Japan NPB | 2021/05/14 09:00 | Softbank Hawks v Nippon Ham Fighters | L | 5-2 |
| Japan NPB | 2021/05/12 08:45 | Orix Buffaloes v Nippon Ham Fighters | W | 1-2 |
Away History
| Japan NPB | 2021/05/21 08:45 | Nippon Ham Fighters v Seibu Lions | W | 1-7 |
| Japan NPB | 2021/05/20 08:45 | Softbank Hawks v Seibu Lions | W | 2-7 |
| Japan NPB | 2021/05/19 08:45 | Softbank Hawks v Seibu Lions | L | 6-5 |
| Japan NPB | 2021/05/18 08:45 | Softbank Hawks v Seibu Lions | L | 8-2 |
| Japan NPB | 2021/05/16 05:00 | Seibu Lions v Lotte Marines | D | 6-6 |
| Japan NPB | 2021/05/15 05:00 | Seibu Lions v Lotte Marines | W | 3-0 |
| Japan NPB | 2021/05/14 08:45 | Seibu Lions v Lotte Marines | D | 4-4 |
| Japan NPB | 2021/05/12 05:00 | Seibu Lions v Rakuten Eagles | L | 3-4 |