Stephen A. Smith and Vincent Goodwill share their thoughts on Floyd Mayweather Jr. and Manny Pacquiao's rematch. (1:22) Jai Opetaia should be the biggest name in Australian boxing, with the gap to No. 2 not particularly close. The cruiserweight king, who was born in Sydney but fights out of the Gold Coast, has flattened every opponent that's been brave enough to share the ring with him, and has collected the IBF and Ring world championship straps to solidify his place among the sport's modern-day titans. In his 29 fights as a professional, Opetaia has scored 23 knockouts and won the other six bouts on points. He's defended a world title on seven occasions, was recently ranked third in Max Kellerman's best pound-for-pound boxers on the planet, and, if things go to plan, could soon be set to unify the cruiserweight division. And yet despite his greatness, the accolades he's stacking, and the path he's forging, Opetaia continues to be criminally underappreciated by the bulk of the Australian public.…