Oddsmakers have pegged Nick Diaz as the underdog at UFC 183. | Dave Mandel/Sherdog.com

The Ultimate Fighting Championship officially announced the return of two of its biggest superstars on Tuesday with the news that Anderson Silva and Nick Diaz will square off at UFC 183 The five-round fight is set to take place during Super Bowl weekend, on Saturday, Jan. 31. The bout will be contested at middleweight in Las Vegas.Both men have spent a fair amount of time away from the Octagon, but upon their return, bookmakers have given “The Spider” the edge when it comes to betting odds.According to BestFightOdds.com, the opening line lists Silva as a -350 favorite or 2/7. On the opposite end, Diaz is getting play at +318 or 159/50.In layman’s terms, a bet of $350 on Silva would net you an additional $100 (plus your investment), while a $100 wager on Diaz would earn $318 (plus the $100 back).