The rumors have been swirling that someone on the UFC 143 card failed his post-fight drug test. Now we have confirmation via an email from Nevada State Athletic Commission Executive Director Keith Kizer that SOMEONE on the card did indeed fail a drug test.

Here's an email sent from the NSAC commission to members of the MMA media:

From: Keith Kizer
Date: Thu, Feb 9, 2012 at 12:16 PM
Subject: UFC 143

Thank you for the many email and phone calls. I am still waiting for all the steroid and drug test results to come back. We did have at least one positive test. I will send out an email later today on that matter.

Keith Kizer
Executive Director
Nevada Athletic Commission

Things to keep in mind:

1. There is no indication as to who is the fighter in question.
   
   
2. There is no indication as to whether the drug test failure is for performance enhancing drugs (PEDs) or drugs of abuse.

Here's another clue for you all, SI reporter Josh Gross tweeted this earlier: