All available race results Jan van Rooy
| Date | Race | Rank |
| 30/05 | Nederlands Kampioenschap | 2 |
Rider information for 1927
| Rank | 515 |
| Score | 32 |
| Name | Jan VAN ROOY |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 16/07 | Nederlands Kampioenschap | 3 |
Rider information for 1928
| Rank | 554 |
| Score | 31 |
| Name | Jan VAN ROOY |
| Country | Netherlands |
| Team | Individual |