Head to Head
| Japan NPB Exhibition | 2021/03/21 04:00 | Yakult Swallows v Seibu Lions | W | 6-8 |
| Japan NPB Exhibition | 2021/03/20 04:00 | Yakult Swallows v Seibu Lions | W | 1-2 |
| Japan NPB Exhibition | 2020/03/15 04:00 | Seibu Lions v Yakult Swallows | W | 3-1 |
| Japan NPB Exhibition | 2020/03/14 04:00 | Seibu Lions v Yakult Swallows | W | 1-0 |
| Japan NPB Exhibition | 2020/03/13 04:00 | Seibu Lions v Yakult Swallows | W | 7-2 |
| Japan NPB | 2019/06/16 04:00 | Yakult Swallows v Seibu Lions | W | 6-10 |
| Japan NPB | 2019/06/15 05:00 | Yakult Swallows v Seibu Lions | L | 6-5 |
| Japan NPB | 2019/06/14 09:00 | Yakult Swallows v Seibu Lions | W | 1-11 |
Home History
| Japan NPB | 2021/05/05 04:00 | Orix Buffaloes v Seibu Lions | W | 2-6 |
| Japan NPB | 2021/05/04 05:00 | Orix Buffaloes v Seibu Lions | D | 6-6 |
| Japan NPB | 2021/05/03 08:45 | Orix Buffaloes v Seibu Lions | L | 6-3 |
| Japan NPB | 2021/05/01 05:00 | Seibu Lions v Nippon Ham Fighters | L | 4-5 |
| Japan NPB | 2021/04/30 09:00 | Seibu Lions v Nippon Ham Fighters | W | 5-1 |
| Japan NPB | 2021/04/29 05:00 | Lotte Marines v Seibu Lions | L | 5-2 |
| Japan NPB | 2021/04/28 08:45 | Lotte Marines v Seibu Lions | W | 2-3 |
| Japan NPB | 2021/04/27 08:45 | Lotte Marines v Seibu Lions | W | 1-3 |
Away History
| Japan NPB | 2021/05/05 05:00 | Hanshin Tigers v Yakult Swallows | D | 2-2 |
| Japan NPB | 2021/05/04 05:00 | Hanshin Tigers v Yakult Swallows | L | 11-5 |
| Japan NPB | 2021/05/02 05:00 | Yakult Swallows v Yokohama Bay Stars | L | 7-8 |
| Japan NPB | 2021/05/01 05:00 | Yakult Swallows v Yokohama Bay Stars | L | 2-10 |
| Japan NPB | 2021/04/30 08:45 | Yakult Swallows v Yokohama Bay Stars | W | 4-0 |
| Japan NPB | 2021/04/28 08:30 | Yomiuri Giants v Yakult Swallows | L | 7-3 |
| Japan NPB | 2021/04/27 08:30 | Yomiuri Giants v Yakult Swallows | L | 14-11 |
| Japan NPB | 2021/04/25 08:30 | Chunichi Dragons v Yakult Swallows | W | 3-4 |