By now you've almost certainly heard the big story that ex-UFC middleweight champion Anderson Silva has tested positive for multiple banned substances, most notably drostanolone, an anabolic steroid. It has completely overshadowed the same-day announcement of Nick Diaz's own drug test failure for marijuana (again) and will certainly be the top topic in the MMA world for at least the rest of this week.

This is certainly not a good look for Silva's camp, Black House MMA, which has now developed a brief but unsettling history of drug testing issues. Dating back to the middle of 2014, this marks the 3rd different Black House fighter to test positive specifically for drostanolone. On July 30th, UFC middleweight Kevin Casey popped for the steroid following his UFC 175 win over Bubba Bush in Las Vegas. Just three weeks later, featherweight prospect Brian Ortega was busted for the same substance by California officials after he defeated Mike de la Torre at UFC on Fox 12 in San Jose. Their wins were both flipped to no contests, with Casey suspended for a year and Ortega nine months.

You can hear more from Anderson at his post UFC 183 presser

Stretching it even further back to 2012, Rafael Cavalcante tested positive for stanozolol (also an anabolic steroid) in his final Strikeforce fight before joining the UFC. That makes it four different steroid-related drug test failures from the same camp within the past three years.

It could just be pure coincidence -- when considering the two Brazilians train in Rio de Janeiro while Casey and Ortega are based in the California gym -- over a relatively short period of time, or a very troubling trend from one of MMA's premier camps. Either way, questions will surely be raised about Black House now that its biggest name has been caught using the same steroid as two others less than a year apart.