If Conor McGregor is serious about a rematch with Floyd Mayweather, all he needs to do is call ... this according to Mayweather Promotions CEO, Leonard Ellerbe.
Ellerbe runs Floyd's boxing business and has had his hands in some of the biggest events in the company's history ... including the McGregor and Pacquiao fights.
So, now that Conor has publicly stated he wants a second crack at Floyd, we asked Leonard if Mayweather would be down.
"Conor McGregor knows he's always welcome to that ass whooping," Ellerbe tells TMZ Sports.