Head to Head
| Japão - NPB | 2021/05/16 05:00 | Seibu Lions v Lotte Marines | D | 6-6 |
| Japão - NPB | 2021/05/15 05:00 | Seibu Lions v Lotte Marines | L | 3-0 |
| Japão - NPB | 2021/05/14 08:45 | Seibu Lions v Lotte Marines | D | 4-4 |
| Japão - NPB | 2021/04/29 05:00 | Lotte Marines v Seibu Lions | W | 5-2 |
| Japão - NPB | 2021/04/28 08:45 | Lotte Marines v Seibu Lions | L | 2-3 |
| Japão - NPB | 2021/04/27 08:45 | Lotte Marines v Seibu Lions | L | 1-3 |
| Japão - NPB | 2021/04/11 05:00 | Seibu Lions v Lotte Marines | L | 2-1 |
| Japão - NPB | 2021/04/10 05:00 | Seibu Lions v Lotte Marines | W | 2-6 |
Home History
| Japão - NPB | 2021/06/13 05:00 | Yomiuri Giants v Lotte Marines | W | 4-5 |
| Japão - NPB | 2021/06/12 05:00 | Yomiuri Giants v Lotte Marines | L | 11-4 |
| Japão - NPB | 2021/06/11 08:45 | Yomiuri Giants v Lotte Marines | L | 5-1 |
| Japão - NPB | 2021/06/10 08:45 | Yakult Swallows v Lotte Marines | W | 1-2 |
| Japão - NPB | 2021/06/09 08:45 | Yakult Swallows v Lotte Marines | L | 5-3 |
| Japão - NPB | 2021/06/08 08:45 | Yakult Swallows v Lotte Marines | W | 4-7 |
| Japão - NPB | 2021/06/06 05:00 | Lotte Marines v Yokohama Bay Stars | L | 3-4 |
| Japão - NPB | 2021/06/05 05:00 | Lotte Marines v Yokohama Bay Stars | L | 9-11 |
Away History
| Japão - NPB | 2021/06/15 09:00 | Seibu Lions v Hiroshima Carp | L | 3-5 |
| Japão - NPB | 2021/06/14 09:00 | Seibu Lions v Hiroshima Carp | W | 3-2 |
| Japão - NPB | 2021/06/13 04:00 | Chunichi Dragons v Seibu Lions | W | 3-4 |
| Japão - NPB | 2021/06/12 05:00 | Chunichi Dragons v Seibu Lions | W | 3-7 |
| Japão - NPB | 2021/06/11 08:45 | Chunichi Dragons v Seibu Lions | L | 6-5 |
| Japão - NPB | 2021/06/10 08:45 | Yokohama Bay Stars v Seibu Lions | W | 3-5 |
| Japão - NPB | 2021/06/09 08:45 | Yokohama Bay Stars v Seibu Lions | D | 8-8 |
| Japão - NPB | 2021/06/08 08:45 | Yokohama Bay Stars v Seibu Lions | W | 3-8 |