Last week, Floyd Mayweather announced that he will fight a rematch with Marcos Maidana on Sept. 13. Their first fight, two months ago, was Mayweather’s closest challenge in years, with many in the boxing media believing that Maidana had earned the decision. And while that bout may have failed to meet expectations at the box office, the competitiveness and controversy are sure to make the sequel the biggest fight of the year. More important from Mayweather’s point of view is that it will net him the single largest paycheck of any athlete on the planet this year. (It’s distinctly possible that Mayweather will earn more for those 36 minutes than LeBron James will earn in salary over the next two years.) And while you can expect to hear a lot of noise about this fight over the coming months, there’s one storyline that you probably won’t hear much about.