This is a sub-list from List of doping cases in sport representing a full list of surnames starting with X.
| Name | Country | Event | Banned substance(s) | Reference(s) |
|---|---|---|---|---|
| Abel Xavier |
 Portugal
|
Football (soccer) | Methandienone (Dianabol) | |
| Xiong Guoming |
 China
|
Swimming | Clenbuterol |