The biggest news in the MMA world yesterday were the change sto UFC 175 that saw Wanderlei Silva pulled from his bout with Chael Sonnen and replaced by Vitor Belfort. The story was that both Silva and Sonnen were to be subjected to random drug testing by the Nevada State Athletic Commission (NSAC). When it came time for Silva to undergo his test, he was said to have refused, resulting in a situation where the NSAC couldn't allow the fight to go ahead as planned.

Sonnen spoke to Kenny Florian at a UFC Tonight taping and had a lot to say on the matter, "Wanderlei has operated his entire career under the shadow of suspicion that he was using performance enhancing drugs. However he has never failed a drug test, so we don't speculate on those types of things." Sonnen continued, "That clean record came to a screeching halt on Saturday night. Not only did he fail his test, he refused to take the test, and as you know a refusal is equal in the eyes of the commission to a failure. He ran from the test, Kenny, and I don't mean that figuratively, I mean they came to his gym and he literally ran. He goes out of a side door, they go after him saying his name."

Sonnen added that he believes Silva will lose his fight license and may never fight in the UFC again.

The Sonnen/Belfort bout is a number one contender bout for the middleweight championship according to Sonnen, with the winner facing the winner of Chris Weidman vs. Lyoto Machida. Sonnen has not won a bout at middleweight since January of 2012, and has gone 1-3 since that point, losing three times by TKO. Sonnen is also 0-4 in UFC and WEC title fights, including his loss to Anderson Silva in their first fight which saw Sonnen test positive for significantly elevated testosterone levels.