The Ultimate Fighter (TUF) 7 alum, Matt Riddle, has known nothing other than Ultimate Fighting Championship (UFC) throughout his 12-fight professional mixed martial arts (MMA) career.

That's about to change.

Riddle is in "Deep Waters" again after failing his second drug test for marijuana in a span of three fights -- and just seven months -- and has been released from the promotion, according to MMAFighting.com. Riddle was fresh off a split decision win over Che Mills at UFC on FUEL TV 7: "Barao vs. McDonald," which took place at Wembley Arena in London, England, on Feb. 16, 2013.

It appears that the "Win" will now be changed to a "No Contest," just like his "Submission of the Night"-bonus "Win" over Chris Clements at UFC 149 in Calgary, Alberta, Canada, on July 21, 2012, was ruled a "No Contest" after he tested positive for pot afterward (more on that here).

Riddle served a 90-day suspension for that transgression, returning four months later to outpoint John Maguire at UFC 154. His punishment this time around, clearly, is a bit more schwag.

Meanwhile, it's unclear if the positive result will have any impact on Mills' future with the organization -- he, too, was cut several days later (more on that here), even though UFC President Dana White felt that he "quit and walked away" at the end of the Welterweight bout.

It's no secret that Riddle is a proud medical marijuana card-carrying member, moving from Pennsylvania to Nevada just so he could legally rip therapeutic bong tubes. Not one to typically "hold back" outside the Octagon, Riddle has been outspoken about banned substances in MMA today, saying he thought it was "ridiculous" that fighters were allowed medical exemptions for Testosterone Replacement Therapy (TRT), which he called steroids, while marijuana users were penalized.

He might be right, but rules are rules.