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 | |||||
|---|---|---|---|---|---|---|---|
 Tour de Suisse (2.1) | |||||||
| 14-06 | Stage 4Solothurn - Genève (190.0km) | ||||||
| 13-06 | 3 | Stage 3bSolothurn - Balmberg (12.0km) | |||||
| 11-06 | 7 | Stage 1Wohlen - Uster (205.0km) | |||||
 Dauphiné Libéré (2.1) | |||||||
| 14 |  Standings | ||||||
| 02-06 | Stage 7Valence - Avignon (198.0km) | ||||||
| Tour de Romandie (2.1) | |||||||
| 9 | Standings | ||||||
| 10-05 | Stage 5bVernier - Vernier (27.0km) | ||||||
| 03-05 | 24 | Meisterschaft von Zürich (1.1) | |||||
| 01-05 | 27 |  Rund um den Henninger Turm (1.1) | |||||
 Ronde van België (2.3) | |||||||
| 24-04 | 1 | Stage 5aBredene - Bredene (13.0km) | |||||
| 24-04 | Stage 5bBredene - Sint-Jans-Molenbeek (142.0km) | ||||||
| 23-04 | Stage 4Lembeek - Bredene (132.0km) | ||||||
| 22-04 | Stage 3Athus - Lembeek (232.0km) | ||||||
| 21-04 | 8 | Stage 2Oreye - Athus (197.0km) | |||||
| 20-04 | 7 | Stage 1aQuievrain - Quievrain (15.0km) | |||||
| 15-04 | 109 | La Flèche Wallonne (1.1) | |||||
| 29-03 | 16 | De Brabantse Pijl (1.3) | |||||
Teams
| Year | Team |
|---|---|
| 1983 |  Teka |
| 1982 | Splendor - Wickes |
| 1982 | La Redoute - Motobecane |
| 1981 | Ti - Raleigh - Creda |
| 1980 | DAF Trucks - Lejeune |
| 1979 | Daf Trucks - Aida |
Victories
| This year | 0 |
| Total | 1 |