"Let's see who can talk the most about a boxer". Mcgregor has his hands full with Aldo and Rousey can't even work out a deal with Cyborg. But both seem to find time in their busy schedules to call out Mayweather, UNPROMPTED by the way. Do you know how much money the UFC would have to pay Mayweather just to sign his name to fight anyone? I don't know either but I guarantee that it is more than the last 5 paydays of UFC main event winners.