USADA must be trying to make up for lost time.

The UFC's anti-doping partner has drug tested Brock Lesnar five times since his name was put in the program two weeks ago, according to the USADA website. UFC vice president of health and performance Jeff Novitzky confirmed with MMA Fighting on Monday that Lesnar had been tested at least three times.

"I'd expect there are even more to come as well before UFC 200," Novitzky said.

The results of those tests have yet to come back.

Lesnar, the former UFC heavyweight champion, will take on Mark Hunt in the co-main event of UFC 200 on July 9 in Las Vegas. He is returning to the UFC for the first time since retiring after a loss to Alistair Overeem in 2011.

There was a lot of buzz over the last few weeks, because the UFC waived its policy that athletes coming out of retirement had to give USADA four months notice before competing. The UFC said that Lesnar has extenuating circumstances because it has been so long since he fought, well before the USADA anti-doping policy was in place.

Lesnar, 38, is one of the biggest pay-per-view draws in UFC history. He is also a huge star in WWE, where he will return starting with the SummerSlam event in August. Lesnar does get drug tested multiple times per year under WWE's wellness program.