All available race results Jean Le Cossec
| Date | Race | Rank |
| Circuit du Morbihan | ||
| 01/05 | Stage 2 | 16 |
| 01/05 | General Classification | 17 |
Rider information for 1938
| Rank | 736 |
| Score | 12 |
| Name | Jean LE COSSEC |
| Country | France |
| Team | Individual |
| Date | Race | Rank |
| Circuit du Morbihan | ||
| 23/04 | Stage 2 | 7 |
| 23/04 | General Classification | 13 |
Rider information for 1939
| Rank | 535 |
| Score | 39 |
| Name | Jean LE COSSEC |
| Country | France |
| Team | Individual |