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Stephan Bonnar On Failed UFC 153 Drug Test

It took five months, but Stephan Bonnar is finally opening up about his UFC 153 steroid bust. In what will likely be his final bout, Bonnar admits to taking an extra substance, but believed it would be out of his system and was only using it after two recent stem cell knee operations.

“Believe it or not, there are some therapeutic uses to some of the banned substances,” said Bonnar on The MMA Hour. “Bottom line, I wanted to get my strength back. I was very weak. My body didn’t feel good, my joints didn’t feel good. That was my goal.”

The substance used was not made public.

Bonnar was shocked to hear that he failed the post-fight drug test as he knew one was coming and all the experts he spoke with assured him that the substance he was using would not be an issue.

It was in October when the UFC was struck with two injuries that cancelled the headliner and co-main event of UFC 153, all within 24 hours and weeks before the promotion returned to Brazil. UFC middleweight champion Anderson Silva volunteered to take on any light heavyweight and Bonnar was chosen.

With three weeks until the biggest fight of his career, Bonnar revealed that he needed to cut 35 pounds as he was under the impression that he was retired and wasn’t in keen shape.

In the first round, Silva land a knee to the chest before the referee stepped in to give Bonnar his first loss by stoppage.

As recently as last month, UFC president Dana White said he had yet to speak with Bonnar and was annoyed about what happened. Bonnar isn’t looking to make excuses and takes full blame for what happened. He continued that his fighting days are likely behind him.