Kelvin Kuo-USA TODAY Sports

The drug test results for UFC 158: St-Pierre vs. Diaz have been returned, and no fighter tested came back with a positive result.

The Quebec Boxing Commission, who oversees mixed martial arts regulations, emailed the results to Bleacher Report on Thursday confirming the results.

According to the statement, six fighters at UFC 158 were tested in their anti-doping program and all six came back with negative results.

Due to medical laws and the rules within the commission, it does not, however, release the names of the six fighters who were tested nor the drugs that they were tested for at the event.

While no names were released, it's almost standard practice among athletic commissions that the main event fighters will be among those tested and in this case four other random fighters on the card.

Regardless whom the fighters were that were drug tested, Nick Diaz's name did not pop up, which means he's clear to return to action if he decides to come out of retirement.

Prior to UFC 158 taking place, Diaz, who has twice been suspended in the past for positive tests for marijuana, stated that he's not sure if he'd pass a drug test if it was administered while he was in Montreal.

“I think (at UFC 143) I tested for a metabolite or a nanogram, it was hardly (anything) so I just did a little more than I did last time so, sorry if I don’t pass the test, but I think it should work out," Diaz said at the UFC 158 pre-fight press conference. "I’ve passed plenty of them before, unless they just weren’t testing me."

Even UFC President Dana White expressed that if Diaz should fail a third test for marijuana post UFC 158 that he might have to make the hard decision to cut the Stockton fighter. It looks like if Diaz wants to come back and compete again, so he's safe to call the UFC home.

The Quebec commission has come under fire since UFC 158 for what has been dubbed "Weight Gate" where there was an apparent rule that allowed title fighters Georges St-Pierre and Nick Diaz to come in as high as 170.9 pounds and still be ruled as weighing 170 pounds. It's standard practice that for title fights, the competitors must weigh in at or under the weight limit for that particular division, in this case 170 pounds.

Attorneys for Diaz have threatened to file an appeal with the commission over the incident, but no action has been taken at this time.

Damon Martin is a Featured Columnist for Bleacher Report

