Head to Head
| Japan NPB | 2021/06/09 08:45 | Yokohama Bay Stars v Seibu Lions | D | 8-8 |
| Japan NPB | 2021/06/08 08:45 | Yokohama Bay Stars v Seibu Lions | L | 3-8 |
| Japan NPB Exhibition | 2021/03/19 04:00 | Yokohama Bay Stars v Seibu Lions | W | 5-1 |
| Japan NPB | 2019/06/09 04:00 | Seibu Lions v Yokohama Bay Stars | W | 4-6 |
| Japan NPB | 2019/06/08 05:00 | Seibu Lions v Yokohama Bay Stars | W | 3-7 |
| Japan NPB | 2019/06/07 09:00 | Seibu Lions v Yokohama Bay Stars | L | 6-2 |
| Japan Pre-Season Friendlies | 2019/03/24 04:00 | Seibu Lions v Yokohama Bay Stars | W | 1-6 |
| Japan Pre-Season Friendlies | 2019/03/23 04:00 | Seibu Lions v Yokohama Bay Stars | L | 4-3 |
Home History
| Japan NPB | 2021/06/09 08:45 | Yokohama Bay Stars v Seibu Lions | D | 8-8 |
| Japan NPB | 2021/06/08 08:45 | Yokohama Bay Stars v Seibu Lions | L | 3-8 |
| Japan NPB | 2021/06/06 05:00 | Lotte Marines v Yokohama Bay Stars | W | 3-4 |
| Japan NPB | 2021/06/05 05:00 | Lotte Marines v Yokohama Bay Stars | W | 9-11 |
| Japan NPB | 2021/06/04 08:45 | Lotte Marines v Yokohama Bay Stars | L | 11-7 |
| Japan NPB | 2021/06/03 08:45 | Softbank Hawks v Yokohama Bay Stars | W | 3-4 |
| Japan NPB | 2021/06/02 08:45 | Softbank Hawks v Yokohama Bay Stars | D | 1-1 |
| Japan NPB | 2021/06/01 08:45 | Softbank Hawks v Yokohama Bay Stars | W | 3-4 |
Away History
| Japan NPB | 2021/06/09 08:45 | Yokohama Bay Stars v Seibu Lions | D | 8-8 |
| Japan NPB | 2021/06/08 08:45 | Yokohama Bay Stars v Seibu Lions | W | 3-8 |
| Japan NPB | 2021/06/06 04:00 | Seibu Lions v Yakult Swallows | L | 6-9 |
| 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 |