Head to Head
| Japan NPB | 2021/04/10 05:00 | Seibu Lions v Lotte Marines | L | 2-6 |
| Japan NPB | 2021/04/09 08:45 | Seibu Lions v Lotte Marines | W | 7-4 |
| Japan NPB Exhibition | 2021/03/07 04:00 | Seibu Lions v Lotte Marines | W | 4-2 |
| Japan NPB Exhibition | 2021/03/06 04:00 | Seibu Lions v Lotte Marines | L | 0-4 |
| Japan NPB | 2020/11/08 04:00 | Seibu Lions v Lotte Marines | L | 2-8 |
| Japan NPB | 2020/10/22 09:00 | Lotte Marines v Seibu Lions | W | 4-7 |
| Japan NPB | 2020/10/21 09:00 | Lotte Marines v Seibu Lions | W | 1-2 |
| Japan NPB | 2020/10/20 09:00 | Lotte Marines v Seibu Lions | W | 1-2 |
Home History
| Japan NPB | 2021/04/10 05:00 | Seibu Lions v Lotte Marines | L | 2-6 |
| Japan NPB | 2021/04/09 08:45 | Seibu Lions v Lotte Marines | W | 7-4 |
| Japan NPB | 2021/04/08 08:45 | Rakuten Eagles v Seibu Lions | L | 4-0 |
| Japan NPB | 2021/04/07 08:45 | Rakuten Eagles v Seibu Lions | L | 6-3 |
| Japan NPB | 2021/04/06 08:45 | Rakuten Eagles v Seibu Lions | L | 13-2 |
| Japan NPB | 2021/04/04 04:00 | Seibu Lions v Softbank Hawks | W | 4-2 |
| Japan NPB | 2021/04/03 05:00 | Seibu Lions v Softbank Hawks | W | 7-4 |
| Japan NPB | 2021/04/02 09:00 | Seibu Lions v Softbank Hawks | W | 6-2 |
Away History
| Japan NPB | 2021/04/10 05:00 | Seibu Lions v Lotte Marines | W | 2-6 |
| Japan NPB | 2021/04/09 08:45 | Seibu Lions v Lotte Marines | L | 7-4 |
| Japan NPB | 2021/04/08 08:45 | Orix Buffaloes v Lotte Marines | L | 5-1 |
| Japan NPB | 2021/04/07 08:45 | Orix Buffaloes v Lotte Marines | W | 2-9 |
| Japan NPB | 2021/04/06 08:45 | Orix Buffaloes v Lotte Marines | D | 3-3 |
| Japan NPB | 2021/04/04 05:00 | Lotte Marines v Nippon Ham Fighters | D | 1-1 |
| Japan NPB | 2021/04/03 05:00 | Lotte Marines v Nippon Ham Fighters | W | 6-5 |
| Japan NPB | 2021/04/02 09:00 | Lotte Marines v Nippon Ham Fighters | W | 16-4 |