McGregor makes his professional debut at the T-Mobile Arena in Las Vegas, taking on Mayweather in a twelve-round light middleweight bout.
The Irishman is the current UFC lightweight champion, with this weight class limit being 155lbs. In boxing, light middleweight is a maximum of 154lbs.
*The above picture is of McGregor weighing in for his lightweight title win over Eddie Alvarez last year.
McGregor has formerly competed at 145lbs, where he was both a UFC and Cage Warriors featherweight champion. However it was regularly noted that it was an extreme challenge for the Crumlin man to make weight.
‘The Notorious’ is said to walk around at 170lbs.
Mayweather last night estimated that, with four days to go, McGregor still had 10lbs to lose.
The 40 year old five-weight champ told FightHype that “Conor McGregor is extremely heavy right now. I think he is 164, so he still has 10 pounds to go.”
“Get that extra money if he can’t make the weight, get those extra millions ready, Dana. Or the UFC, get them extra millions ready.”
“Somebody’s got to pay a fine, but he’s got to get that weight down. A true champion is, like I said before, I true champion is disciplined and very responsible, but you know, we’ll see. I don’t think he’s going to make the weight.”
“Even if he does make the weight, that’s even better, but if he don’t make the weight, we still gonna fight. But it’s going to be a be a heavy fine. Give me that money.”
This was relayed to McGregor at the fighter arrival event in Sin City last night, and he gave the assembled media a message for Mayweather.
“Tell him to shut his fucking mouth. He knows nothing, fool of a thing.”
“Let him keep praying. Praying for fatigue. Praying for me to take a back step. All he’s doing is praying but he’s praying to the new God of boxing.”
McGregor then stressed that his weight making for this fight was “absolutely phenomenal, like it always is. Tell me one time it wasn’t.”