Info
| Last name | Maas |
| First name | Jo |
| Nationality |  Netherlands |
| Date of birth | 06-10-1954 |
| Age | 71 |
| Place of birth | Eijsden |
Monuments
| Date | Rank | Race | |
|---|---|---|---|
| 10-10 | 40 |  Paris - Tours (1.1) | |
| 22-09 | 84 |  Paris-Brussel (1.1) | |
 Vuelta a España (2.HC) | |||
| 22 |  Standings | ||
| 09-05 | Stage 19Madrid - Madrid (84.0km) | ||
| 07-05 | 6 | Stage 17San Fernando de Henares - Navacerrada (178.0km) | |
| 05-05 | 7 | Stage 15bTomelloso - Campo de Criptana (35.0km) | |
| 15-04 | 35 | La Flèche Wallonne (1.1) | |
| 06-03 | 48 | Omloop Het Volk (1.1) | |