World Middleweight Champion Sergio &lsquo;Maravilla&rsquo; Martinez talks: Barker, Pacquiao, and Cotto in an exclusive interview with La Prensa San Diego By Steve Galindo III &nbsp;&nbsp;&nbsp; Just like a fine wine, WBC &lsquo;Diamond&rsquo; Middleweight champion Sergio Maravilla Martinez (47-2-2, 26 KOs) just keeps getting better with age. And, while most may see that as a gift, [...]