| Japonia - NPB Reserve League | 2019/06/23 04:00 | Seibu Lions - Rezerwa v Yokohama Bay Stars - Rezerwa | W | 0-4 |
| Japonia - NPB Reserve League | 2019/06/22 04:00 | Seibu Lions - Rezerwa v Yokohama Bay Stars - Rezerwa | D | 0-0 |
| Japonia - NPB Reserve League | 2019/06/21 02:00 | Seibu Lions - Rezerwa v Yokohama Bay Stars - Rezerwa | W | 1-10 |
| Japonia - NPB Reserve League | 2019/05/31 09:00 | Seibu Lions - Rezerwa v Yokohama Bay Stars - Rezerwa | W | 1-4 |
| Japonia - NPB Reserve League | 2019/07/07 05:00 | Nipponham Fighters - Rezerwa v Yokohama Bay Stars - Rezerwa | L | 5-4 |
| Japonia - NPB Reserve League | 2019/07/06 09:00 | Nipponham Fighters - Rezerwa v Yokohama Bay Stars - Rezerwa | W | 1-4 |
| Japonia - NPB Reserve League | 2019/07/05 09:00 | Nipponham Fighters - Rezerwa v Yokohama Bay Stars - Rezerwa | W | 1-2 |
| Japonia - NPB Reserve League | 2019/07/03 09:00 | Yomiuri Giants - Rezerwa v Yokohama Bay Stars - Rezerwa | L | 9-6 |
| Japonia - NPB Reserve League | 2019/07/02 02:00 | Yomiuri Giants - Rezerwa v Yokohama Bay Stars - Rezerwa | L | 3-0 |
| Japonia - NPB Reserve League | 2019/06/28 04:00 | Yokohama Bay Stars - Rezerwa v Chiba Lotte Marines - Rezerwa | L | 3-4 |
| Japonia - NPB Reserve League | 2019/06/23 04:00 | Seibu Lions - Rezerwa v Yokohama Bay Stars - Rezerwa | W | 0-4 |
| Japonia - NPB Reserve League | 2019/06/22 04:00 | Seibu Lions - Rezerwa v Yokohama Bay Stars - Rezerwa | D | 0-0 |
| Japonia - NPB Reserve League | 2019/07/06 07:00 | Seibu Lions - Rezerwa v Yomiuri Giants - Rezerwa | W | 5-0 |
| Japonia - NPB Reserve League | 2019/07/05 07:00 | Seibu Lions - Rezerwa v Yomiuri Giants - Rezerwa | W | 3-1 |
| Japonia - NPB Reserve League | 2019/07/03 04:00 | Seibu Lions - Rezerwa v Nipponham Fighters - Rezerwa | W | 2-1 |
| Japonia - NPB Reserve League | 2019/06/28 04:00 | Yakult Swallows - Rezerwa v Seibu Lions - Rezerwa | L | 4-3 |
| Japonia - NPB Reserve League | 2019/06/27 04:00 | Rakuten Eagles - Rezerwa v Seibu Lions - Rezerwa | W | 0-2 |
| Japonia - NPB Reserve League | 2019/06/26 04:00 | Rakuten Eagles - Rezerwa v Seibu Lions - Rezerwa | W | 5-6 |
| Japonia - NPB Reserve League | 2019/06/25 04:00 | Rakuten Eagles - Rezerwa v Seibu Lions - Rezerwa | L | 5-1 |
| Japonia - NPB Reserve League | 2019/06/23 04:00 | Seibu Lions - Rezerwa v Yokohama Bay Stars - Rezerwa | L | 0-4 |