For the past five years, heavyweight Alistair Overeem (36-11) has endured a ton of speculation around his alleged use of steroids. The Dutchman’s name was first linked with performance enhancing drugs after he decided to beef up from a lanky light heavyweight into a massive, muscle-ridden monster, though up until this past spring he’d never actually been caught using any banned substances.

Overeem’s claim to complete innocence disappeared when he tested positive for an elevated T:E ratio in his system brought on by testosterone use. While Overeem directed blame towards his doctor, he still lost out on a chunk of his career as a result in addition to a crack at champion Junior dos Santos (15-1).

Dos Santos and Overeem have been jawing back and forth ever since, leading up to a likely meeting in 2013 if both exit upcoming bouts with a win in tow. While Dos Santos has no problem fighting Overeem, he recently made it clear he’s not naïve enough to believe “The Demolition Man” earned his spot at the top through hard work rather than by chemical means.

“His results in (past) fights, we can’t take that very serious because he failed in the drug test, so it’s not good for him. For sure before he failed his test, he was using something illegal too,” stated Dos Santos in an interview with Sherdog Radio.

“Overeem is a pretty good fighter, but he’s starting to talk a lot of sh*t now,” Dos Santos continued, criticizing Overeem for attempting to talk his way into a title-shot. “It’s not good for the sport. It’s not good for him because nobody wants to see a champion like this, saying the stupid things that he’s saying.”

Both men are scheduled for action in the coming months. Dos Santos is set to defend his divisional gold against former champ Cain Velasquez in a few weeks at UFC 155, while Overeem is expected to have his license reinstated before year’s end and has already been booked for a February fight against Antonio Silva.