"Coming out of retirement in 2020", he wrote in a post that also included a photo of himself with his hands taped, shirt off and boxing shorts on. "Boxing is a very, very brutal sport".
When Mayweather was last seen in a boxing ring, it was a December 2018 exhibition against a Japanese kickboxer. I make great money doing exhibitions; between $10 and $30 million. It is also rumored that he is working with UFC President Dana White following his announcement on social media that the two are working on a "spectacular event" next year. Mayweather won the fight easily, but there was rumors about fight fixing and it has been quiet around the 42-year-old boxer since then. It was just time for Mayweather to feel the media spotlight again.
Mayweather spoke of "building his brand" in the UFC after he defeated McGregor two years ago so it is possible he could face McGregor in the octagon. There are plenty of fighters Mayweather could go up against right now but it's clear that most fans want the Pacquiao rematch.
A lot of people online are making guesses about who Mayweather will choose to fight next if he really is coming out.
Mayweather, who was undefeated in his career with a record of 50-0, is considered one of boxing's all-time greats.
"I'll still travel and do exhibitions", said Mayweather.
Could Mayweather be set to make his UFC debut? Both White and UFC's official account reposted Mayweather's announcement.
A rematch with Conor McGregor could sell, mainly because the Irish MMA fighter did very well in his pro debut against the best defense boxer in the world before getting stopped in the tenth round.