Head to Head
| Japan - NPB | 2018/06/18 09:00 | Seibu Lions v Yokohama Bay Stars | W | 2-4 |
| Japan - NPB | 2018/06/07 09:00 | Seibu Lions v Yokohama Bay Stars | L | 9-7 |
| Japan - NPB | 2018/06/05 09:00 | Seibu Lions v Yokohama Bay Stars | L | 8-1 |
| Japan - NPB | 2017/06/11 04:00 | Yokohama Bay Stars v Seibu Lions | L | 0-1 |
| Japan - NPB | 2017/06/10 05:00 | Yokohama Bay Stars v Seibu Lions | L | 2-6 |
| Japan - NPB | 2017/06/09 09:00 | Yokohama Bay Stars v Seibu Lions | W | 4-3 |
| Japan - NPB | 2016/06/02 09:00 | Seibu Lions v Yokohama Bay Stars | L | 4-1 |
| Japan - NPB | 2016/06/01 09:00 | Seibu Lions v Yokohama Bay Stars | L | 7-0 |
Home History
| Japan Pre-Season Friendlies | 2019/03/14 04:00 | Rakuten Eagles v Yokohama Bay Stars | L | 5-2 |
| Japan Pre-Season Friendlies | 2019/03/13 04:00 | Rakuten Eagles v Yokohama Bay Stars | L | 4-3 |
| Japan Pre-Season Friendlies | 2019/03/07 04:00 | Chunichi Dragons v Yokohama Bay Stars | W | 0-5 |
| Japan Pre-Season Friendlies | 2019/03/06 04:00 | Chunichi Dragons v Yokohama Bay Stars | L | 5-2 |
| Japan Pre-Season Friendlies | 2019/02/24 04:00 | Yokohama Bay Stars v Hiroshima Carp | D | 4-4 |
| Japan Pre-Season Friendlies | 2019/02/23 04:00 | Chunichi Dragons v Yokohama Bay Stars | W | 4-8 |
| Japan - NPB | 2018/10/10 09:00 | Yokohama Bay Stars v Hanshin Tigers | L | 1-2 |
| Japan - NPB | 2018/10/09 09:00 | Yokohama Bay Stars v Yakult Swallows | W | 4-1 |
Away History
| Japan Pre-Season Friendlies | 2019/03/06 09:00 | Seibu Lions v Softbank Hawks | L | 2-5 |
| Japan Pre-Season Friendlies | 2019/03/05 09:00 | Seibu Lions v Softbank Hawks | W | 11-3 |
| Japan - NPB | 2018/10/21 04:00 | Softbank Hawks v Seibu Lions | L | 6-5 |
| Japan - NPB | 2018/10/20 05:00 | Softbank Hawks v Seibu Lions | L | 8-2 |
| Japan - NPB | 2018/10/19 09:00 | Softbank Hawks v Seibu Lions | L | 15-4 |
| Japan - NPB | 2018/10/18 09:00 | Softbank Hawks v Seibu Lions | W | 5-13 |
| Japan - NPB | 2018/10/17 09:00 | Softbank Hawks v Seibu Lions | L | 10-4 |
| Japan - NPB | 2018/10/06 09:00 | Seibu Lions v Softbank Hawks | L | 3-8 |