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 | |||||
|---|---|---|---|---|---|---|---|
| 22-08 | DNF | UCI World Championship Valkenburg (CM) | |||||
 Tour de France (GT) | |||||||
| 36 |  Standings | ||||||
| 25-07 | Stage 21Roubaix - Paris (286.0km) | ||||||
| 13-06 | 4 | National Road Championships - Netherlands (CN) | |||||
| 09-06 | 6 |  Tour du Romandie
(2.1) | |||||
| Ronde van Nederland (2.PRO) | |||||||
| 25-04 | 4 | Stage 2Groningen - Enschede (180.0km) | |||||