Diaz believes UFC champ St-Pierre is on steroids

George St. Pierre (left) will battle Nick Diaz at UFC 158

Nick Diaz is confident UFC welterweight champion Georges St-Pierre is on steroids.

Diaz appeared on Tim & Sid Thursday on Sportsnet 590 The Fan where he said he doesn’t believe the UFC will test St-Pierre for performance-enhancing drugs before the two men fight Saturday in the main event at UFC 158 in Montreal at the Bell Centre.

“I believe that he is on plenty of steroids and I don’t think they test around here either,” Diaz said. “I doubt I’ll be tested as well. I don’t care what they’re saying or marketing to the media. I don’t think either of us will be tested. And if so, he’s probably got a bottle of piss in his pocket.

“I doubt they’re standing over him and making sure he’s not on steroids.”

When asked if the UFC could be complicit in St-Pierre taking steroids, Diaz strongly agreed and insinuated that they were corrupt.

“The sport is geared towards that guy winning,” Diaz said. “Sure, why not? Lance Armstrong was. He was on steroids. It was a really ridiculous thing that he was on steroids.”

At the same time, Diaz refused to guarantee that he would pass a drug screening this weekend in Montreal.

“Hell no, I’m not guaranteeing anything,” Diaz said. “If I don’t pass the test, I’m sorry. I could probably use another year off vacation. I don’t enjoy this — taking punches to the mouth. I need to feed my family. I’ve made this investment and I haven’t sat down and made any commitments to anything other this and martial arts.”

Diaz believes that many, including UFC president Dana White are hoping he will lose to St-Pierre at UFC 158 because the Canadian fighter is the poster boy for the brand.

“I would imagine that they do (want me to lose). I think that’s what the U.S. wants. It’s not their fault. They are educated on what’s been marketed to them, just like any company. There’s a certain amount of money that goes out that make sure this job gets done. That’s why there’s fat people because they ate it right up. They need to learn marketing and advertising. That’s what this sport has taught me.”

Earlier on Thursday Diaz and GSP exchanged some unpleasantries at the pre-fight press conference.

When submitting content, please abide by our submission guidelines, and avoid posting profanity, personal attacks or harassment. Should you violate our submissions guidelines, we reserve the right to remove your comments and block your account. Sportsnet reserves the right to close a story’s comment section at any time.