From WWE.com:
The U.S. Anti-Doping Agency (USADA) has informed Brock Lesnar of a potential policy violation, stemming from an out-of-competition sample collected on June 28, 2016, according to a statement released by UFC on Friday afternoon and reported on by ESPN and other news sources.
Lesnar successfully returned to the UFC against Mark Hunt 12 days later on July 9 at UFC 200. The results of the sampling were received by USADA on July 14.
UFC released the following statement on the matter via Twitter
Statement by UFC on potential anti-doping violation by Brock Lesnar: pic.twitter.com/oydm46UzC5
— SportsCenter (@SportsCenter) July 15, 2016
"Brock Lesnar has not performed for WWE since WrestleMania and is not scheduled to return until Sunday, August 21."
