Head to Head
| Japán NPB Exhibition | 2020/03/13 04:00 | Seibu Lions v Yakult Swallows | W | 7-2 |
| Japán - NPB | 2019/06/16 04:00 | Yakult Swallows v Seibu Lions | W | 6-10 |
| Japán - NPB | 2019/06/15 05:00 | Yakult Swallows v Seibu Lions | L | 6-5 |
| Japán - NPB | 2019/06/14 09:00 | Yakult Swallows v Seibu Lions | W | 1-11 |
| Japan Pre-Season Friendlies | 2019/03/17 04:00 | Yakult Swallows v Seibu Lions | W | 5-7 |
| Japán - NPB | 2018/06/14 09:00 | Yakult Swallows v Seibu Lions | L | 6-4 |
| Japán - NPB | 2018/06/13 09:00 | Yakult Swallows v Seibu Lions | W | 4-7 |
| Japán - NPB | 2018/06/12 09:00 | Yakult Swallows v Seibu Lions | L | 3-1 |
Home History
| Japán NPB Exhibition | 2020/03/13 04:00 | Seibu Lions v Yakult Swallows | W | 7-2 |
| Japán - NPB Japan Series | 2019/10/13 05:00 | Seibu Lions v Softbank Hawks | L | 3-9 |
| Japán - NPB | 2019/10/11 09:00 | Softbank Hawks v Seibu Lions | L | 7-0 |
| Japán - NPB | 2019/10/10 09:00 | Softbank Hawks v Seibu Lions | L | 8-6 |
| Japán - NPB | 2019/10/09 09:00 | Softbank Hawks v Seibu Lions | L | 8-4 |
| Japán - NPB | 2019/09/26 09:00 | Seibu Lions v Rakuten Eagles | L | 1-7 |
| Japán - NPB | 2019/09/24 09:15 | Seibu Lions v Lotte Marines | W | 12-4 |
| Japán - NPB | 2019/09/23 04:00 | Seibu Lions v Rakuten Eagles | W | 5-3 |
Away History
| Japán NPB Exhibition | 2020/03/13 04:00 | Seibu Lions v Yakult Swallows | L | 7-2 |
| Japán NPB Exhibition | 2020/03/11 04:00 | Yakult Swallows v Hanshin Tigers | L | 1-3 |
| Japán NPB Exhibition | 2020/03/10 04:00 | Yakult Swallows v Hiroshima Carp | L | 0-2 |
| Japán NPB Exhibition | 2020/03/05 09:00 | Softbank Hawks v Yakult Swallows | L | 5-3 |
| Japán NPB Exhibition | 2020/03/04 09:00 | Softbank Hawks v Yakult Swallows | L | 8-1 |
| Japán NPB Exhibition | 2020/03/03 04:00 | Softbank Hawks v Yakult Swallows | W | 0-2 |
| Japán NPB Exhibition | 2020/02/29 09:00 | Yomiuri Giants v Yakult Swallows | W | 3-5 |
| Japán NPB Exhibition | 2020/02/24 04:00 | Yakult Swallows v Hanshin Tigers | D | 2-2 |