Anderson Silva’s reign of terror over the middleweight division began with a three-minute mauling of Rich Franklin in October 2006. In the seven years since, “The Spider” has barely been challenged inside the Octagon, turning away a Who’s Who in the 185-pound and even 205-pound divisions. However, a growing number of experts expect that challenge to finally emerge in the form of undefeated No. 1 contender Chris Weidman at  UFC 162: Silva vs. Weidman on July 6 at the MGM Grand in Las Vegas. Leading Las Vegas oddsmakers make the 9-0 Weidman the shortest underdog to face Silva in over five years, since then-reigning PRIDEFC champion Dan Henderson collided with the Brazilian back in March 2008. The sportsbooks believe a Weidman victory this Independence Day Weekend is more likely than a Chael Sonnen victory was at last summer’s Independence Weekend event, despite Sonnen having famously dominated Silva for four-plus rounds in a previous bout.