Head to Head
| 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 | L | 3-0 |
| Japan NPB | 2021/05/14 08:45 | Seibu Lions v Lotte Marines | D | 4-4 |
| Japan NPB | 2021/04/29 05:00 | Lotte Marines v Seibu Lions | W | 5-2 |
| Japan NPB | 2021/04/28 08:45 | Lotte Marines v Seibu Lions | L | 2-3 |
| Japan NPB | 2021/04/27 08:45 | Lotte Marines v Seibu Lions | L | 1-3 |
| Japan NPB | 2021/04/11 05:00 | Seibu Lions v Lotte Marines | L | 2-1 |
| Japan NPB | 2021/04/10 05:00 | Seibu Lions v Lotte Marines | W | 2-6 |
Home History
| Japan NPB | 2021/06/05 05:00 | Lotte Marines v Yokohama Bay Stars | L | 9-11 |
| Japan NPB | 2021/06/04 08:45 | Lotte Marines v Yokohama Bay Stars | W | 11-7 |
| Japan NPB | 2021/06/03 08:45 | Lotte Marines v Chunichi Dragons | L | 3-4 |
| Japan NPB | 2021/06/02 08:45 | Lotte Marines v Chunichi Dragons | D | 2-2 |
| Japan NPB | 2021/06/01 08:45 | Lotte Marines v Chunichi Dragons | L | 0-1 |
| Japan NPB | 2021/05/30 05:00 | Hiroshima Carp v Lotte Marines | W | 1-7 |
| Japan NPB | 2021/05/29 05:00 | Hiroshima Carp v Lotte Marines | W | 3-7 |
| Japan NPB | 2021/05/28 08:45 | Hiroshima Carp v Lotte Marines | L | 10-8 |
Away History
| Japan NPB | 2021/06/05 05:00 | Seibu Lions v Yakult Swallows | W | 6-3 |
| Japan NPB | 2021/06/04 08:30 | Seibu Lions v Yakult Swallows | L | 1-10 |
| Japan NPB | 2021/06/03 08:45 | Seibu Lions v Yomiuri Giants | D | 4-4 |
| Japan NPB | 2021/06/02 08:45 | Seibu Lions v Yomiuri Giants | L | 3-4 |
| Japan NPB | 2021/06/01 08:45 | Seibu Lions v Yomiuri Giants | D | 4-4 |
| Japan NPB | 2021/05/30 04:00 | Hanshin Tigers v Seibu Lions | L | 9-8 |
| Japan NPB | 2021/05/29 08:45 | Hanshin Tigers v Seibu Lions | W | 0-1 |
| Japan NPB | 2021/05/28 08:45 | Hanshin Tigers v Seibu Lions | L | 10-7 |