LAS VEGAS, NV - JANUARY 31: Anderson Silva punches at Nick Diaz in their middleweight bout during UFC 183 at the MGM Grand Garden Arena on January 31, 2015 in Las Vegas, Nevada. Silva won by unanimous decision. (Photo by Steve Marcus/Getty Images)
LAS VEGAS, NV - JANUARY 31: Anderson Silva punches at Nick Diaz in their middleweight bout during UFC 183 at the MGM Grand Garden Arena on January 31, 2015 in Las Vegas, Nevada. Silva won by unanimous decision. (Photo by Steve Marcus/Getty Images)