All available race results Jan de Groot
| Date | Race | Rank |
| 15/06 | Namen - Antwerpen | 34 |
Rider information for 1902
| Rank | 386 |
| Score | 0 |
| Name | Jan DE GROOT |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 27/09 | Amsterdam - Arnhem - Amsterdam | 5 |
Rider information for 1903
| Rank | 174 |
| Score | 23 |
| Name | Jan DE GROOT |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 17/07 | Amsterdam - Utrecht - Amsterdam | 3 |
| 06/11 | Nederlands Kampioenschap | 1 |
Rider information for 1904
| Rank | 69 |
| Score | 68 |
| Name | Jan DE GROOT |
| Country | Netherlands |
| Team | Individual |