I just read recently that Siarhei Lyahovich is planning to fight again. Not that I'm a fan of his and the White Wolf did briefly hold the WBO heavyweight title, but for God's sake if anybody shouldn't be fighting it's this guy. Having held the WBO belt makes him a name opponent, but this guy has been brutally knocked out numerous times. Someone should ban him from fighting. A similar guy that I have in mind is Enzo Maccarinelli, one or two more knockouts that he suffers and his brain will be macaroni.
Roy Jones Jr. He's 50 now but his last fight happened in 2018 and who knows if he'll get the urge to try having a fight in his 50s. He shouldn't. James Toney has taken enough punches in his life and shouldn't come back for more. Oliver McCall has been fighting recently again. It's time for him to end his comeback. Andre Ward. He had a flawless career and it isn't worth him coming back in his mid 30s to start fighting again. Wladimir Klitschko should away from fighting again.
Actually I'd quite like to see Mayweather vs Pacquiao 2 Beyond that all of them need to stay retired. Especially Wlad, Toney, McCall and Briggs