Floyd Mayweather to Come out of Retirement in 2020. On Nov. 21, Mayweather took to Instagram to announce an end to his boxing retirement. . In his post, Mayweather posed for a photo with UFC president Dana White and hinted at a “spectacular event” in 2020. [Dana White] and I working together again to bring the world another spectacular event in 2020, Floyd Mayweather, via Instagram. An hour later, Mayweather posted a photo of himself in boxing gear with the caption, “coming out of retirement in 2020.”. Mayweather first retired from the “brutal sport” in 2015 after beating Andre Berto. . According to a recent interview with Reuters, Mayweather made the decision to retire because “[his] health is [his] wealth.”. I've got calls to get back into the ring, but my health is my wealth … Boxing is a very, very brutal sport … You have got to know when to hang it up. I had a great career, Floyd Mayweather, to Reuters. Since then, he’s only come out of retirement once, in 2017, to face off against Conor McGregor, whom he defeated by TKO