News broke late Friday evening that former UFC heavyweight champion Frank Mir had Ben informed of a potential doping violation by the US Anti-Doping Agency. 
The potential drug testing failure stems from Mir’s recent fight against Mark Hunt, which he lost via 1st round KO. 

The UFC released a statement through UFC.com which read:
The UFC organization was notified today that the U.S. Anti-Doping Agency (USADA) has informed Frank Mir of a potential Anti-Doping Policy violation stemming from an in-competition sample collected the day of his fight on March 20, 2016 in Brisbane, Australia. 

USADA, the independent administrator of the UFC Anti-Doping Policy, will handle the results management and appropriate adjudication of this case involving Mir. It is important to note that, under the UFC Anti-Doping Policy, there is a full and fair legal process that is afforded to all athletes before any sanctions are imposed. 

Additional information will be provided at the appropriate time as the process moves forward.