I seriously don’t know how this is even a topic of discussion. Floyd Mayweather and Conor McGregor are not fighting each other in a sanctioned, regulated event. Could they “box” in a celebrity boxing event for charity, or something of that notion, sure, but that is the extent this conversation should go.
Fight Hub ran into Freddie Roach, and apparently Roach got a call to train McGregor for Floyd. Roach says that he would train McGregor to make his boxing better, but not to fight Floyd Mayweather.