Former WEC featherweight champion and current UFC bantamweight number one contender Urijah Faber says goodbye to his trademark locks to show support for his sister, who was forced to undergo brain surgery following a car accident.

The UFC recently announced that "The California Kid" will coach opposite his arch rival, Dominick Cruz, for the upcoming season of The Ultimate Fighter (TUF) 15 when it debuts on the FX channel on March 9, 2012, with a two-hour premiere.

Cruz and Faber have beef from their days competing under the World Extreme Cagefighting (WEC) banner. Faber, the promotion's 145-pound champion, made quick work of "The Dominator" with a first round submission (guillotine choke) in March 2007.

Cruz dropped 10 pounds shortly after the loss, the first of his mixed martial arts (MMA) career, and went on to win the bantamweight belt. Faber eventually followed suit after two losses to Mike Brown and another to Jose Aldo, hoping a change of scenery would help get him back to the Promised Land.

However, in the most recent match up between Cruz and Faber at UFC 132 -- a fast-paced and furious, five-round fight -- Cruz would exact revenge in the form of a unanimous decision.

Ever since that fateful night back on July 2, 2011, in Las Vegas, Nevada, Faber has been calling for another crack at Cruz, who he believes he defeated when they last squared off. He'll now get another (title) shot at the culmination of the coaching season.

For more on TUF 15 click here.