Two-time UFC heavyweight champion Frank Mir has tested positive in a drugs test, but denies committing a doping violation.
Mir revealed he has been notified by the United States Anti-Doping Agency (USADA) that a sample he supplied following his UFC Fight Night 85 bout with Mark Hunt, which ended in a first-round knockout loss, on March 26 returned a positive result.
However, the 36-year-old, who is the longest-serving active fighter in the UFC, denies knowingly taking any illegal substances.
"To all my fans and supporters, I recently have been notified by USADA that the test I took on the night of the fight came back positive for a substance that I did not take," said Mir in a statement.
"I don't know how that is possible as I did not take any performance enhancing drugs (PEDs) to compete.
"I have never tested positive for a banned substance since joining the UFC and becoming a [two-time] champion.
"I ask all of you to hold judgement against me until all the facts have been revealed."
Mir later revealed on the Phone Booth Fighting podcast he had tested positive for an anabolic steroid.