Five Rounds: Who would win a mythical Mayweather-McGregor fight?

ByABC News
May 29, 2016, 10:46 AM

— -- Each week, ESPN.com writer and MMA Live Extra analyst Brett Okamoto provides his take on the hottest topics in the world of mixed martial arts.

This week, Okamoto squares off with ESPN.com senior boxing writer Dan Rafael to discuss the wild premise of a fight between retired boxing superstar Floyd Mayweather and UFC featherweight champion Conor McGregor

The worlds of combat sports collide in this special edition of "Five Rounds." 

1. Could a fight (under any rule set) between Mayweather and McGregor actually happen?