UFC light heavyweight champion Daniel Cormier was already on record accusing Jon Jones of being a life-long cheater before Alexander Gustafsson this week also said he believes “Bones” used performance-enhancing drugs before their Sept. 2013 fight at UFC 167.

In a Wednesday appearance on FS1, Cormier (19-1 MMA, 8-1 UFC) not surprisingly sided with Gustafsson, adding that he believes Jones (22-1 MMA, 16-1 UFC) tried to get away with using PEDs ahead of their UFC 200 fight before it was canceled. Cormier also explained how the presence of the U.S. Anti-Doping Agency will now force Jones to be clean for their July 29 rematch at UFC 214.

“You heard Alexander Gustafsson now is saying he believes that Jon was enhanced throughout his career,” Cormier said, via MMAFighting.com. “But before, we had no sanctioning body like USADA. USADA now is on top of all that, so I do believe that we will see a different fighter in Anaheim, because I do believe he’ll have to be clean this time, otherwise he’ll be caught.”

Cormier said he believes Jones, coming off a suspension at the time, wasn’t happy with his lackluster performance in a win over Ovince Saint Preux at UFC 196. As a result, that motivated Jones’ alleged actions ahead of last July’s UFC 200, according to Cormier.

“I think he fought Ovince Saint Preux clean, and he didn’t like the way he felt,” Cormier said, “and tried to do something again dirty, and he got caught at UFC 200.”

As a result, Jones was suspended for one year. He cited sexual enhancement medication as the reason for a failed drug test, though he’s never admitted to knowingly cheating.

The Cormier rematch will mark Jones’ first fight in 15 months, all the while Cormier has fought four times, all victories. That includes winning the title and defending it twice, most recently last month at UFC 210 with a submission victory that sent Anthony Johnson into retirement.

For more on UFC 214, check out the UFC Rumors section of the site.