This is a sub-list from List of doping cases in sport representing a full list of surnames starting with U.
| Name | Country | Event | Banned substance(s) | Reference(s) |
|---|---|---|---|---|
| Genco Ucan |
 Turkey
|
Swimming | Metenolone | |
| Attila Ungvari |
 Hungary
|
Judo | Stanozolol | |
| Sergey Ulegin |
 Russia
|
Canoe sprint | Amphetamine | |
| Jan Ullrich |
 Germany
|
Cycling | Amphetamine | |
| Kumar Umang |
 India
|
Volleyball | Norandrostenedione | |
| Paritosh Upadhyay |
India
|
Weightlifting | ||
| Juan Guillermo Uran |
 Colombia
|
Swimming | Cocaine | |
| Alexander Urinov |
 Uzbekistan
|
Weightlifting | cannabis | |
| Giampaolo Urlando |
 Italy
|
Hammer throw | Testosterone | |
| Mukhit Usenbaev |
 Kazakhstan
|
Weightlifting | ||
| Alisa Usmanova |
 Belarus
|
Gymnastics | Hydrochlorothiazide | |
| Dariya Ustinova |
Russia
|
Swimming | Tuaminoheptane | |
| Albeiro Usuriaga |
Colombia
|
Football (soccer) | Cocaine |