Head to Head
| Japan NPB | 2021/04/29 05:00 | Lotte Marines v Seibu Lions | L | 5-2 |
| Japan NPB | 2021/04/28 08:45 | Lotte Marines v Seibu Lions | W | 2-3 |
| Japan NPB | 2021/04/27 08:45 | Lotte Marines v Seibu Lions | W | 1-3 |
| Japan NPB | 2021/04/11 05:00 | Seibu Lions v Lotte Marines | W | 2-1 |
| 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 |
Home History
| Japan NPB | 2021/05/04 05:00 | Orix Buffaloes v Seibu Lions | D | 6-6 |
| Japan NPB | 2021/05/03 08:45 | Orix Buffaloes v Seibu Lions | L | 6-3 |
| Japan NPB | 2021/05/01 05:00 | Seibu Lions v Nippon Ham Fighters | L | 4-5 |
| Japan NPB | 2021/04/30 09:00 | Seibu Lions v Nippon Ham Fighters | W | 5-1 |
| Japan NPB | 2021/04/29 05:00 | Lotte Marines v Seibu Lions | L | 5-2 |
| Japan NPB | 2021/04/28 08:45 | Lotte Marines v Seibu Lions | W | 2-3 |
| Japan NPB | 2021/04/27 08:45 | Lotte Marines v Seibu Lions | W | 1-3 |
| Japan NPB | 2021/04/25 04:00 | Seibu Lions v Rakuten Eagles | L | 4-8 |
Away History
| Japan NPB | 2021/05/02 04:00 | Lotte Marines v Rakuten Eagles | W | 6-5 |
| Japan NPB | 2021/05/01 05:00 | Lotte Marines v Rakuten Eagles | L | 0-3 |
| Japan NPB | 2021/04/30 09:00 | Lotte Marines v Rakuten Eagles | L | 1-8 |
| 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 | 2021/04/25 04:00 | Softbank Hawks v Lotte Marines | W | 5-8 |
| Japan NPB | 2021/04/24 05:00 | Softbank Hawks v Lotte Marines | W | 9-11 |