UFC Heavyweight Mark Hunt is to sue following his UFC 200 loss to Brock Lesnar and Lesnar’s drug test failure, according to a report by ESPN’s Brett Okamoto.

The civil suit, filed against UFC, Dana White and Brock Lesnar alleges that they “affirmatively circumvented and obstructed fair competition for their own benefit.” 

Lesnar failed drug testing for an anti-estrogen agent called clomiphene. He was fined $250,000 and suspended for one year by USADA. Hunt made $700,000 for the fight, far less than the $2.5 million purse for Lesnar and whatever Lesnar made on top of that from his pay-per-view bonus.

Hunt believes more action should have been taken against Lesnar and other fighters who are caught taking drugs not approved by USADA. Hunt told ESPN.com: “They’re allowing guys to do this. They had a chance to take all the money from this guy, because he’s a cheater, and they didn’t.”