What time does the main event start?Probably not before 11:15 ET
What happens to Mayweather if he loses to McGregor?According to James Brady of SB Nation: "He’ll be in full retreat on his statements following a loss to McGregor, though, and will come up with every excuse he can."I tend to agree with that statement.
Is the reputation of MMA fighting damaged if McGregor loses?Absolutely not. This is a boxing match, between one of the best boxers in this generation and a man who's never boxed professionally at this level. MMA loses zero credibility if McGregor loses.
Does the change to 8 oz. gloves matter?No. Mayweather fought using 8 oz. gloves for much of his boxing career.