All available race results Theo Sijthoff
No results available in season 1960.
Rider information for 1960
| Rank | 1322 |
| Score | 0 |
| Name | Theo SIJTHOFF |
| Country | Netherlands |
| Team | W.B.R. - Sinalco |
| Date | Race | Rank |
| Ronde van Nederland | ||
| 16/05 | Stage 1b | 12 |
| 19/05 | Stage 4 | 21 |
Rider information for 1961
| Rank | 877 |
| Score | 11 |
| Name | Theo SIJTHOFF |
| Country | Netherlands |
| Team | Radium |
| Date | Race | Rank |
| 11/03 | Kuurne - Brussel - Kuurne | 22 |
Rider information for 1962
| Rank | 965 |
| Score | 4 |
| Name | Theo SIJTHOFF |
| Country | Netherlands |
| Team | Pelforth - Sauvage - Lejeune |
| Date | Race | Rank |
| 05/05 | Meisterschaft von Zürich | 64 |
Rider information for 1963
| Rank | 856 |
| Score | 5 |
| Name | Theo SIJTHOFF |
| Country | Netherlands |
| Team | Caballero |
No results available in season 1964.
Rider information for 1964
| Rank | 1302 |
| Score | 0 |
| Name | Theo SIJTHOFF |
| Country | Netherlands |
| Team | Caballero |
| Date | Race | Rank |
| 07/03 | Ronde van Limburg | 38 |
| Ronde van Nederland | ||
| 16/05 | General Classification | 78 |
Rider information for 1965
| Rank | 937 |
| Score | 5 |
| Name | Theo SIJTHOFF |
| Country | Netherlands |
| Team | Acifit - Avaros |
No results available in season 1966.
Rider information for 1966
| Rank | 1157 |
| Score | 0 |
| Name | Theo SIJTHOFF |
| Country | Netherlands |
| Team | Rijnbende |