The Anderson Silva leg injury

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.

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

EDS NOTE GRAPHIC CONTENT: Anderson Silva, right, of Brazil, screams after kicking Chris Weidman of Baldwin, N.Y., and injuring his leg during the UFC 168 mixed martial arts middleweight championship bout on Saturday, Dec. 28, 2013, in Las Vegas. Weidman won during the second round by a technical knock out after the kick by Silva. (AP Photo/David Becker)