Look at it this way. If Mayweather wins, here are the 3 options....
1) I can't see this going the distance. No way McGregor can dance around and get jabbed for all that time. He's too flat footed.
2) I don't think Mayweather knocks him out easily. He's had 1 KO since 2007.
3) If Mayweather knocks him out, I can see it coming in like a 4th/5th rd when McGregor loses some steam.
Why would McGregor sign up for this fight? Only for money and to get jabbed at for 4-5 rounds before losing? I think he absolutely feels like there's a chance he can finish this with one punch.