If Brock Lesnar did indeed fail a drug test for performance-enhancing drugs, he could face a fine from the Nevada State Athletic Commission of $1.25 million to $1.875 million. NSAC guidelines state that athletes may be fined 50 to 75 percent of their purse if they fail a drug test for anabolic steroids (including testosterone and human growth hormone).
Lesnar was reported to have made $2.5 million for fighting Mark Hunt at UFC 200 in Las Vegas, Nevada, on July 9. Fines could be lower if the NSAC believes Lesnar inadvertently took a tainted supplement.
Dave Meltzer stated on Wrestling Observer Radio (subscription required) that the NSAC may also choose to go after additional money Lesnar is due to make from UFC for his pay-per-view bonus, which could be millions of dollars more. Meltzer estimated Lesnar's total payment for UFC 200 at $6 million.
A NSAC hearing regarding Lesnar's possible USADA violation is expected to take place within a couple weeks, based on the fact that Jon Jones already has a similar hearing scheduled for this Monday, July 18, after news broke on July 7 that Jones possibly violated USADA policy.
Besides fines, Lesnar could be suspended from MMA for two years if he's found to have used PEDs. He may receive a shorter suspension if the commission believes the violation was inadvertent. In either case, though, if he did fail a USADA drug test leading up to UFC 200, his win over Hunt will likely be overturned.