The biggest fight in combat sports can 't be contained to just straight-up wagering. Maybe the chalk on Floyd Mayweather is too high or you think. Action is coming in on prop bets at the sportsbooks in the final week of Those that are as bullish as the MMA star can bet the fight to go. After two months of build up, it is finally fight night. On Saturday night, all eyes will be on Floyd Mayweather and Conor McGregor. Whether.