Head to Head
| Japan NPB | 2021/05/23 05:00 | Nippon Ham Fighters v Seibu Lions | W | 10-3 |
| Japan NPB | 2021/05/22 05:00 | Nippon Ham Fighters v Seibu Lions | L | 1-8 |
| 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 |
Home History
| Japan NPB | 2021/06/22 09:00 | Nippon Ham Fighters v Orix Buffaloes | L | 2-5 |
| Japan NPB | 2021/06/20 04:00 | Nippon Ham Fighters v Softbank Hawks | D | 1-1 |
| Japan NPB | 2021/06/19 05:00 | Nippon Ham Fighters v Softbank Hawks | D | 5-5 |
| Japan NPB | 2021/06/18 09:00 | Nippon Ham Fighters v Softbank Hawks | W | 2-1 |
| Japan NPB | 2021/06/16 09:00 | Nippon Ham Fighters v Hiroshima Carp | W | 8-1 |
| Japan NPB | 2021/06/13 05:00 | Yokohama Bay Stars v Nippon Ham Fighters | L | 4-1 |
| Japan NPB | 2021/06/12 05:00 | Yokohama Bay Stars v Nippon Ham Fighters | W | 3-4 |
| Japan NPB | 2021/06/11 09:00 | Yokohama Bay Stars v Nippon Ham Fighters | L | 4-0 |
Away History
| Japan NPB | 2021/06/22 08:45 | Rakuten Eagles v Seibu Lions | W | 0-2 |
| Japan NPB | 2021/06/20 04:00 | Lotte Marines v Seibu Lions | D | 3-3 |
| Japan NPB | 2021/06/19 05:00 | Lotte Marines v Seibu Lions | W | 2-7 |
| Japan NPB | 2021/06/18 08:45 | Lotte Marines v Seibu Lions | L | 5-0 |
| Japan NPB | 2021/06/15 09:00 | Seibu Lions v Hiroshima Carp | L | 3-5 |
| Japan NPB | 2021/06/14 09:00 | Seibu Lions v Hiroshima Carp | W | 3-2 |
| Japan NPB | 2021/06/13 04:00 | Chunichi Dragons v Seibu Lions | W | 3-4 |
| Japan NPB | 2021/06/12 05:00 | Chunichi Dragons v Seibu Lions | W | 3-7 |