Update: WWE acknowledged Lesnar's violation albeit very brief and to the point:

“Brock Lesnar has not performed for WWE since WrestleMania and is not scheduled to return until Sunday, Aug. 21”.

Update: The UFC has released the following statement:

“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.”

Original Story: Fox Sports is reporting that the UFC was notified today by the USADA that Brock Lesnar failed an out of competition test that was collected on June 28, 2016. Lesnar and the UFC have not released a statement yet but I am sure one will be released soon. If the allegations are true his win over Mark Hunt might be overturned and a suspension is all but guaranteed.

We'll update you guys once more information is available.