All available race results Leo van Thielen
| Date | Race | Rank |
| Wyścig Pokoju / Závod Míru / Friedensfahrt | ||
| 14/05 | Stage 5 | 6 |
| 22/05 | General Classification | 81 |
Rider information for 1975
| Rank | 615 |
| Score | 7 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Individual |
No results available in season 1976.
Rider information for 1976
| Rank | 923 |
| Score | 2 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Individual |
No results available in season 1977.
Rider information for 1977
| Rank | 949 |
| Score | 1 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Individual |
Rider information for 1978
| Rank | 390 |
| Score | 63 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Safir - Beyers - Ludo |
| Date | Race | Rank |
| 04/03 | Ronde van Limburg | 5 |
| 24/03 | G.P. E3 - Harelbeke | 8 |
| 08/04 | Paris - Roubaix | 44 |
| 24/04 | Nokere Koerse | 10 |
| 01/05 | Grote 1 Mei-Prijs Hoboken | 8 |
| 31/07 | Scheldeprijs - Schoten | 31 |
| 09/09 | G.P. de Fourmies | 9 |
| 16/09 | G.P. Jef Scherens - Leuven | 9 |
| 19/09 | Paris - Bruxelles | 60 |
Rider information for 1979
| Rank | 309 |
| Score | 100 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Safir - Geuze - Saint Louis - Ludo |
| Date | Race | Rank |
| 19/03 | Milano - Sanremo | 139 |
| Driedaagse De Panne | ||
| 27/03 | General Classification | 18 |
| 02/04 | Gent - Wevelgem | 24 |
| 08/04 | G.P. de Denain | 1 |
| 10/04 | G.P. Pino Cerami | 9 |
| 15/04 | Nokere Koerse | 28 |
Rider information for 1980
| Rank | 358 |
| Score | 77 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Eurobouw - Cambio - Rino - Rossin |
| Date | Race | Rank |
| 28/03 | G.P. E3 - Harelbeke | 30 |
| Driedaagse De Panne | ||
| 30/03 | Stage 1b | 4 |
| 31/03 | Stage 2 | 3 |
| 01/04 | General Classification | 26 |
| 05/04 | Ronde van Vlaanderen | 37 |
| 08/04 | Gent - Wevelgem | 60 |
| 21/04 | Paris - Camembert | 47 |
| 01/05 | Grote 1 Mei-Prijs Hoboken | 3 |
| 28/07 | Scheldeprijs - Schoten | 6 |
| 01/08 | Grosser Preis des Kantons Aargau - Gippingen | 18 |
| Tour de l'Avenir | ||
| 11/09 | Stage 3 | 5 |
| 12/09 | Stage 4 | 3 |
| 19/09 | Stage 10 | 13 |
| 21/09 | General Classification | 68 |
Rider information for 1981
| Rank | 357 |
| Score | 102 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Eurobouw |
| Date | Race | Rank |
| Paris - Nice | ||
| 15/03 | Stage 4 | 13 |
| 18/03 | General Classification | 65 |
| Driedaagse De Panne | ||
| 30/03 | Stage 1a | 3 |
| 31/03 | Stage 2 | 13 |
| 01/04 | General Classification | 42 |
| 07/04 | Gent - Wevelgem | 29 |
| 4 Jours de Dunkerque | ||
| 05/05 | Stage 1 | 9 |
| 08/05 | Stage 4 | 11 |
| 09/05 | Stage 5b | 6 |
| 09/05 | General Classification | 29 |
| 12/09 | G.P. de Fourmies | 19 |
| 19/09 | G.P. Jef Scherens - Leuven | 16 |
Rider information for 1982
| Rank | 396 |
| Score | 79 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | Europ Decor |
No results available in season 1983.
Rider information for 1983
| Rank | 1234 |
| Score | 0 |
| Name | Leo VAN THIELEN |
| Country | Belgium |
| Team | B.W.B. - André Berden |