Julio Cesar Chavez Jr's 12th round rally against Sergio Martinez

<div class="meta image-caption"><div class="origin-logo origin-image "><span></span></div><span class="caption-text">Julio Cesar Chavez Jr., right, of Mexico, talks with his father, legendary boxer Julio Cesar Chavez, left, at a news conference to promote his upcoming middleweight championship boxing match with Sergio Martinez, of Argentina, in Los Angeles, Tuesday, July 10, 2012. The pair are scheduled to fight on Sept. 15 in Las Vegas. &#40;AP Photo&#47;Reed Saxon&#41; (AP Photo&#47; Reed Saxon)</span></div>
September 16, 2012 8:07:29 AM PDT