All available race results Manlio Piazza
| Date | Race | Rank |
| Giro d'Italia | ||
| 19/05 | Stage 1 | 99 |
| 21/05 | Stage 2 | 106 |
| 23/05 | Stage 3 | 87 |
| 25/05 | Stage 4 | 113 |
| 27/05 | Stage 5 | 47 |
| 31/05 | Stage 7 | 54 |
| 04/06 | Stage 10 | 80 |
| 05/06 | Stage 11 | 12 |
| 07/06 | Stage 12 | 54 |
| 09/06 | Stage 14 | 10 |
| General Classification | 60 | |
| 23/06 | Milano - Modena | 7 |
Rider information for 1929
| Rank | 235 |
| Score | 105 |
| Name | Manlio PIAZZA |
| Country | Italy |
| Team | Individual |
| Date | Race | Rank |
| Tour de Hongrie | ||
| 08/09 | General Classification | 11 |
Rider information for 1930
| Rank | 1697 |
| Score | 0 |
| Name | Manlio PIAZZA |
| Country | Italy |
| Team | Individual |