All available race results Thomas Prehn
| Date | Race | Rank |
| Red Zinger Classic | ||
| 09/07 | Stage 2 | 3 |
| 15/07 | General Classification | 7 |
Rider information for 1978
| Rank | 744 |
| Score | 7 |
| Name | Thomas PREHN |
| Country | United States |
| Team | Individual |
| Date | Race | Rank |
| Coors Classic | ||
| 12/07 | Stage 6 | 3 |
Rider information for 1983
| Rank | 819 |
| Score | 6 |
| Name | Thomas PREHN |
| Country | United States |
| Team | Individual |
No results available in season 1985.
Rider information for 1985
| Rank | 1391 |
| Score | 0 |
| Name | Thomas PREHN |
| Country | United States |
| Team | Schwinn |
No results available in season 1986.
Rider information for 1986
| Rank | 636 |
| Score | 28 |
| Name | Thomas PREHN |
| Country | United States |
| Team | Schwinn - Icy Hot |
No results available in season 1987.
Rider information for 1987
| Rank | 744 |
| Score | 21 |
| Name | Thomas PREHN |
| Country | United States |
| Team | Schwinn - Icy Hot - Wolber - Shimano |
No results available in season 1988.
Rider information for 1988
| Rank | 1427 |
| Score | 0 |
| Name | Thomas PREHN |
| Country | United States |
| Team | F.E.I. Velo |