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Anderson Silva's gruesome leg injury at UFC 168 left MMA fans in attendance in shock. (Getty)

The Anderson Silva leg injury

Yahoo Sports

Only 13 months after a gruesome injury that appeared to end his legendary fighting career, former middleweight champion Anderson Silva will return to the UFC when he meets Nick Diaz in a middleweight bout in the main event of a Jan. 31 pay-per-view show in Las Vegas.