The UFC released a statement today revealing that Brock Lesnar failed a drug test he took on June 28, with results have just come in on July 14:
"The UFC organization was notified today that the U.S. Anti-Doping Agency (USADA) has informed Brock Lesnar of a potential Anti-Doping Policy violation stemming from an out-of-competition sample collection on June 28, 2016. USADA received the testing results from the June 28, 2016 sample collection from the WADA-accredited UCLA Olympic Analytical Laboratory on the evening of July 14, 2016.
"USADA, the independent administrator of the UFC Anti-Doping Policy, will handle the results management and appropriate adjudication of this case. It is important to note that, under the UFC Anti-Doping Policy, there is a full fair legal review process that is afforded to all athletes before any sanctions are imposed. The Nevada State Athletic Commission also retains jurisdiction over this matter as the sample collection was performed in close proximity to Lesnar’s bout at UFC 200 in Las Vegas.
"Consistent with all previous potential anti-doping violations, additional information will be provided at the appropriate time as the process moves forward."
As noted, there is more to come on this situation.
Lesnar made his return to MMA at UFC 200 on July 9, 2016, in a unanimous decision victory over Mark Hunt. That win is subject to change now, pending the completion of the aforementioned process.
WWE has yet to comment on the matter, as the story is just breaking, but Lesnar is currently scheduled to wrestle Randy Orton at SummerSlam next month in Brooklyn and the assumption has been he will figure prominently in the upcoming WWE draft next Tuesday night.