| Club | League | Years |
|---|---|---|
| Lens | Ligue 1 | 1931–1933 |
| Valenciennes | Ligue 1 | 1933–1936 |
| Marseille | Ligue 1 | 1936–1937 |
| Metz | Ligue 1 | 1937–1939, 1945–1949 |
| Reims | Ligue 1 | 1944–1945 |
Only the clubs in the game are in the data; spells at other clubs, loans and youth years may be missing.
Which club pairs is Ignace Kowalczyk an answer for?
In Who Played Both, if two of these clubs meet, Ignace Kowalczyk is one of the right answers.
- Lens – Marseille 56 players
- Lens – Valenciennes 46 players
- Marseille – Metz 42 players
- Marseille – Valenciennes 37 players
- Lens – Metz 36 players
- Metz – Valenciennes 28 players
- Reims – Valenciennes 27 players
- Metz – Reims 26 players
- Marseille – Reims 21 players
- Lens – Reims 20 players
Source: Wikidata (CC0), Wikipedia club articles and player infoboxes (years at each club). Youth spells and appearances that look unplayed are left out; volunteer-kept records can contain gaps or errors.