UFC 136 received a slight makeover this week when the UFC announced heavyweight Dave “Pee Wee” Herman had been removed from the event for undisclosed reasons and Nam Phan vs. Leonard Garcia would be bumped up to the main card as a result. However, Herman himself has since revealed the cause of his unexpected withdrawal and, according to the 26-year old, he’s still unsure as to where it might have stemmed from.

Speaking out on ClinchGear Radio, the 21-2 Herman explained he’d tested positive for marijuana use even though he doesn’t smoke and had initially been told by Texas Department of Licensing and Regulation that his original sample had been lost.

“I went in to get my drug test and a week later they called and said they lost my urine specimen and I had to come in and redo it. That was last week and I went back in that day. Then today they said I failed. I’m like, uh, that’s impossible,” said Herman of the circumstances.

Clearly, however unfortunate it may be for Herman, the positive hit was possible and has left the rising star in a bit of limbo career-wise. Whether or not it will affect his status in the UFC remains to be seen. He is 1-0 in the Octagon with a “Fight of the Night” performance in his debut against Jon Olav Einemo in June at UFC 131.

As mentioned earlier, with Herman’s scheduled scrap with Mike Russow postponed, 145-pounders Phan and Garcia will have a chance to shine on the PPV stage in a re-telling of their controversial December 2010 bout where Garcia was awarded a highly-questionable decision. In fact, the scoring was so bad UFC President Dana White opted to pay Phan his contracted win bonus as well even though he technically picked up a loss as the actual outcome.

UFC 136 takes place October 8 in Houston, Texas and is headlined by a pair of title fights including phenomenal featherweight Jose Aldo defending his gold against former 155-pound contender Kenny Florian and Frank Edgar putting his lightweight belt on the line for a second-straight time against undefeated Gray Maynard.