It’s been widely reported that the relationship soured between the UFC and their longtime welterweight titlist Georges St-Pierre due to disagreement over performance enhancing drugs.

Back in 2013, St-Pierre relinquished his title and left the sport for an indefinite leave, hinting at the issue in a press conference call.

“It’s a lot of things I wanted to do. I wanted to be the greatest and also I said before when I do things, I want to do things to be remembered. To make a difference in the sport. Make the sport reach another level. I’m trying to do it during my last fight. Unfortunately, it did not work. These people are not ready for it. I tried to do my best.”

As we reported here at Caged Insider, St-Pierre’s manager revealed the thing we evidently weren’t ready for: a better drug testing regimen.

He’s since been quiet on the matter — until now.

A controversy raging over UFC middleweight star Anderson Silva, and his testing positive for two banned substances in the weeks prior to his bout with Nick Diaz last Saturday, has led St-Pierre to break his silence.

According to GSP (seen above), the fact the fight was allowed to happen, despite the positive test result a few weeks prior, was a massive failure for the UFC.

“The fight should be cancelled because it’s cheating, it’s a biological weapon that you have,” St. Pierre said in an interview with The Globe and Mail. “If I fight someone with a knife, and the promoter and the organization know I have a knife. I’m bringing a knife into the fight, they should not let me fight because I’m carrying a weapon.

“A performance-enhancing drug is the same thing, it’s a biological weapon. It’s an advantage that you have over your opponent that you should not be able to compete with, because you put the health of the competitor in jeopardy.

“We’re not playing golf, we’re not racing, we’re fighting. Every time we fight we put our lives, our well-being in jeopardy.”

St-Pierre did not reveal any plans for a return to the UFC, or any other MMA organization.