Head to Head
| Japan NPB | 2015/06/12 09:00 | Seibu Lions v Yakult Swallows | L | 3-9 |
| Japan NPB | 2014/06/09 09:00 | Yakult Swallows v Seibu Lions | W | 2-5 |
| Japan NPB | 2014/06/08 05:00 | Yakult Swallows v Seibu Lions | L | 9-5 |
| Japan NPB | 2014/05/24 05:00 | Seibu Lions v Yakult Swallows | W | 12-8 |
| Japan NPB | 2014/05/23 09:00 | Seibu Lions v Yakult Swallows | L | 4-8 |
Home History
| Japan NPB | 2015/06/12 09:00 | Seibu Lions v Yakult Swallows | L | 3-9 |
| Japan NPB | 2015/06/11 09:00 | Seibu Lions v Hiroshima Carp | W | 5-4 |
| Japan NPB | 2015/06/10 09:00 | Seibu Lions v Hiroshima Carp | L | 4-8 |
| Japan NPB | 2015/06/09 09:00 | Seibu Lions v Hiroshima Carp | W | 4-2 |
| Japan NPB | 2015/06/07 04:00 | Yokohama Bay Stars v Seibu Lions | W | 3-9 |
| Japan NPB | 2015/06/06 05:00 | Yokohama Bay Stars v Seibu Lions | W | 1-5 |
| Japan NPB | 2015/06/05 09:00 | Yokohama Bay Stars v Seibu Lions | D | 3-3 |
| Japan NPB | 2015/06/04 09:00 | Chunichi Dragons v Seibu Lions | D | 1-1 |
Away History
| Japan NPB | 2015/06/12 09:00 | Seibu Lions v Yakult Swallows | W | 3-9 |
| Japan NPB | 2015/06/11 09:00 | Orix Buffaloes v Yakult Swallows | L | 3-1 |
| Japan NPB | 2015/06/10 09:00 | Orix Buffaloes v Yakult Swallows | W | 2-3 |
| Japan NPB | 2015/06/09 09:00 | Orix Buffaloes v Yakult Swallows | W | 1-8 |
| Japan NPB | 2015/06/07 04:00 | Yakult Swallows v Lotte Marines | W | 8-4 |
| Japan NPB | 2015/06/06 05:00 | Yakult Swallows v Lotte Marines | W | 9-4 |
| Japan NPB | 2015/06/04 09:00 | Yakult Swallows v Rakuten Eagles | L | 2-7 |
| Japan NPB | 2015/06/03 09:00 | Yakult Swallows v Rakuten Eagles | L | 3-5 |