Head to Head
| Japan NPB | 2019/06/07 09:00 | Seibu Lions v Yokohama Bay Stars | W | 6-2 |
| Japan Pre-Season Friendlies | 2019/03/24 04:00 | Seibu Lions v Yokohama Bay Stars | L | 1-6 |
| Japan Pre-Season Friendlies | 2019/03/23 04:00 | Seibu Lions v Yokohama Bay Stars | W | 4-3 |
| Japan Pre-Season Friendlies | 2019/03/16 04:00 | Yokohama Bay Stars v Seibu Lions | W | 1-4 |
| Japan NPB | 2018/06/18 09:00 | Seibu Lions v Yokohama Bay Stars | L | 2-4 |
| Japan NPB | 2018/06/07 09:00 | Seibu Lions v Yokohama Bay Stars | W | 9-7 |
| Japan NPB | 2018/06/05 09:00 | Seibu Lions v Yokohama Bay Stars | W | 8-1 |
| Japan NPB | 2017/06/11 04:00 | Yokohama Bay Stars v Seibu Lions | W | 0-1 |
Home History
| Japan NPB | 2019/06/07 09:00 | Seibu Lions v Yokohama Bay Stars | W | 6-2 |
| Japan NPB | 2019/06/06 09:00 | Hiroshima Carp v Seibu Lions | W | 2-9 |
| Japan NPB | 2019/06/05 09:00 | Hiroshima Carp v Seibu Lions | L | 9-1 |
| Japan NPB | 2019/06/04 09:00 | Hiroshima Carp v Seibu Lions | W | 4-5 |
| Japan NPB | 2019/06/02 05:00 | Seibu Lions v Lotte Marines | L | 1-8 |
| Japan NPB | 2019/06/01 05:00 | Seibu Lions v Lotte Marines | L | 7-8 |
| Japan NPB | 2019/05/31 09:15 | Seibu Lions v Lotte Marines | W | 3-2 |
| Japan NPB | 2019/05/29 09:00 | Seibu Lions v Rakuten Eagles | W | 4-1 |
Away History
| Japan NPB | 2019/06/07 09:00 | Seibu Lions v Yokohama Bay Stars | L | 6-2 |
| Japan NPB | 2019/06/06 09:00 | Yokohama Bay Stars v Orix Buffaloes | L | 2-3 |
| Japan NPB | 2019/06/05 09:00 | Yokohama Bay Stars v Orix Buffaloes | L | 0-5 |
| Japan NPB | 2019/06/04 09:00 | Yokohama Bay Stars v Orix Buffaloes | W | 3-1 |
| Japan NPB | 2019/06/02 04:00 | Yakult Swallows v Yokohama Bay Stars | L | 5-2 |
| Japan NPB | 2019/06/01 05:00 | Yakult Swallows v Yokohama Bay Stars | W | 0-7 |
| Japan NPB | 2019/05/31 09:00 | Yakult Swallows v Yokohama Bay Stars | W | 2-3 |
| Japan NPB | 2019/05/30 09:00 | Yokohama Bay Stars v Chunichi Dragons | W | 8-1 |