Rousey and Mayweather, what they have in common are mostly laughable opponents and fixed fights... If she can take him down maybe she has a chance, maybe, but it's man vs woman, and both professionals, genetic difference is too much as always, Mayweather could hit her with a glancing blow and knock her out easily, and resist her grappling on male strenght alone... Dana White should tone down this idiotic hype job for Rousey, and maybe improve the UFC making the champions and top contenders fight much more frequently, not once a year...