Info
| Last name | Leoni |
| First name | Adolfo |
| Nationality |  Italy |
| Date of birth | 13-01-1917 |
| Place of birth | Gualdo Tadino |
| Passed away | 19-10-1970 |
| Age when passed away | 53 |
| Place of passing | Massa |
Monuments
| Date | Rank | Race | |
|---|---|---|---|
| 26-10 | 6 | Giro di Lombardia (HIS) | |
| 03-08 | DNF |  UCI World Championship Reims (CM) | |
| Giro d'Italia (2.HC) | |||
| 15-06 | 1 | Stage 19Lugano - Milano (278.0km) | |
| 13-06 | 1 | Stage 17Trento - Sant'Eufemia della Fonte (114.0km) | |
| 10-06 | 3 | Stage 15Vittorio Veneto - Pieve di Cadore (200.0km) | |
| 09-06 | 1 | Stage 14Padova - Vittorio Veneto (132.0km) | |
| 07-06 | 2 | Stage 12Pescara - Cesenatico (267.0km) | |
| 01-06 | 2 | Stage 8Roma - Napoli (231.0km) | |
| 31-05 | 2 | Stage 7Perugia - Roma (240.0km) | |
| 11-05 | 26 | Giro di Romagna (1.1) | |