Info
| Last name | Janssen |
| First name | Sjefke |
| Nationality |  Netherlands |
| Date of birth | 28-10-1919 |
| Place of birth | Elsloo |
| Passed away | 03-12-2014 |
| Age when passed away | 95 |
| Place of passing | Elsloo |
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 21-08 | 20 |  UCI World Championship København (CM) | |||||
| 19-06 | 1 | National Road Championships - Netherlands (CN) | |||||
| Ronde van Nederland (2.PRO) | |||||||
| 27 |  Standings | ||||||
| 15-05 | Stage 10Scheveningen - Amsterdam (144.0km) | ||||||
| 11-05 | 2 | Stage 6Helmond - Geleen (245.0km) | |||||