Away History
| World Club Friendlies | 2021/07/24 14:00 | Ruch Chorzow v MKS Kluczbork | L | 3-0 |
| Europe Friendlies | 2021/07/16 14:30 | MKS Kluczbork v Sleza Wroclaw | L | 2-5 |
| Europe Friendlies | 2021/07/14 16:00 | MKS Kluczbork v Stal Brzeg | W | 5-1 |
| Poland III Liga | 2021/06/19 13:00 | Pniowek Pawlowice Slaskie v MKS Kluczbork | L | 5-2 |
| Poland III Liga | 2021/06/12 15:00 | MKS Kluczbork v Miedz Legnica II | L | 1-2 |
| Poland III Liga | 2021/06/06 13:00 | Gwarek Tarnowskie Gory v MKS Kluczbork | L | 2-1 |
| Poland III Liga | 2021/05/29 15:00 | Stal Brzeg v MKS Kluczbork | W | 1-2 |
| Poland III Liga | 2021/05/26 15:00 | MKS Kluczbork v ROW 1964 Rybnik | D | 3-3 |