Head to Head
| Japan NPB | 2019/05/14 09:00 | Seibu Lions v Softbank Hawks | W | 11-7 |
| Japan NPB | 2019/04/21 04:00 | Softbank Hawks v Seibu Lions | L | 16-5 |
| Japan NPB | 2019/04/20 05:00 | Softbank Hawks v Seibu Lions | W | 4-6 |
| Japan NPB | 2019/04/19 09:00 | Softbank Hawks v Seibu Lions | L | 2-0 |
| Japan NPB | 2019/03/31 04:00 | Seibu Lions v Softbank Hawks | L | 1-3 |
| Japan NPB | 2019/03/30 04:00 | Seibu Lions v Softbank Hawks | L | 5-6 |
| Japan NPB | 2019/03/29 09:30 | Seibu Lions v Softbank Hawks | L | 4-5 |
| Japan Pre-Season Friendlies | 2019/03/06 09:00 | Seibu Lions v Softbank Hawks | L | 2-5 |
Home History
| Japan NPB | 2019/05/14 09:00 | Seibu Lions v Softbank Hawks | W | 11-7 |
| Japan NPB | 2019/05/12 05:00 | Seibu Lions v Nippon Ham Fighters | W | 6-3 |
| Japan NPB | 2019/05/11 05:00 | Seibu Lions v Nippon Ham Fighters | L | 0-8 |
| Japan NPB | 2019/05/10 09:00 | Seibu Lions v Nippon Ham Fighters | L | 5-7 |
| Japan NPB | 2019/05/09 09:00 | Lotte Marines v Seibu Lions | L | 5-4 |
| Japan NPB | 2019/05/08 09:00 | Lotte Marines v Seibu Lions | L | 12-1 |
| Japan NPB | 2019/05/06 04:00 | Rakuten Eagles v Seibu Lions | L | 8-4 |
| Japan NPB | 2019/05/05 04:00 | Seibu Lions v Rakuten Eagles | W | 4-0 |
Away History
| Japan NPB | 2019/05/14 09:00 | Seibu Lions v Softbank Hawks | L | 11-7 |
| Japan NPB | 2019/05/12 04:00 | Lotte Marines v Softbank Hawks | L | 5-4 |
| Japan NPB | 2019/05/11 05:00 | Lotte Marines v Softbank Hawks | W | 2-4 |
| Japan NPB | 2019/05/10 09:00 | Lotte Marines v Softbank Hawks | L | 9-1 |
| Japan NPB | 2019/05/09 09:00 | Softbank Hawks v Rakuten Eagles | L | 3-4 |
| Japan NPB | 2019/05/08 04:00 | Softbank Hawks v Rakuten Eagles | L | 7-8 |
| Japan NPB | 2019/05/06 04:00 | Orix Buffaloes v Softbank Hawks | W | 6-9 |
| Japan NPB | 2019/05/05 04:00 | Orix Buffaloes v Softbank Hawks | W | 2-7 |