Info
| Last name | Dumay |
| First name | Léon |
| Nationality |  France |
| Date of birth | 22-06-1998 |
| Age | 27 |
| Date | Rank | Race | |||||
|---|---|---|---|---|---|---|---|
| 15-10 | 25 | Chrono des Nations U23 (1.2U) | |||||
| 08-10 | 161 | Paris-Tours Espoirs (1.2U) | |||||
| 29-07 | DNF | National Road Championships - France U23 (CN) | |||||
 Giro Ciclistico della Valle d'Aosta Mont Blanc
(2.2U) | |||||||
| 15-07 | OTL | Stage 4Valtournenche - Breuil-Cervinia (170.0km) | |||||
| 14-07 | 88 | Stage 3Villeneuve - Les Combes (138.0km) | |||||
| 13-07 | 108 | Stage 2Quassolo - Scalaro (172.0km) | |||||
| 12-07 | 114 | Stage 1Saint-Gervais Mont-Blanc - Saint Nicolas de Veroce (8.0km) | |||||
| 28-05 | 69 | Paris-Roubaix Espoirs (1.2U) | |||||