"Today, I'm officially out of retirement for Conor McGregor."
Mayweather, 40, made the announcement over the weekend while speaking with FightHype.com and alluded to a possible showdown this June.
"For Conor McGregor, I'm coming out of retirement, just to fight Conor McGregor.
I don't want to hear no more excuses about the money, about the UFC. Sign the paper with the UFC so you can fight me in June. Simple and plain. Let's fight in June. You're the B side, I'm the A side. We're not here to cry about money. I'm tired of all this crying about money and talking about you want to fight. You blowing smoke up everybody's ass. If you want to fight, sign the paperwork, let's do it.
Today, I'm officially out of retirement for Conor McGregor. We don't need to waste no time. We need to make this s--t happen quickly. Let's get it on in June."
Adding more fuel to the McGregor vs Mayweather fire, the T-Mobile Arena in Las Vegas is reportedly keeping the June 10th date open for this much anticipated mega-fight.
Watch Mayweather's full statement on McGregor below.