Nothing at all........Only one of them is going to retire undefeated Floyd Mayweather.The same the you would have said about adrian Broner till he got his a$$ kicked.
Pathetic, the political sewer that today's sanctioning bodies have created has destroyed the meaning of the word "champion".
That there are to many belts and they are useless and its time for these guys to fight each other!
absolute horsesh!t.
4 of them are undefeated.
The fifth got his title from beating another undefeated but protected fighter.
WBA champion is Marcos Maidana.
WBA Interim champion is undefeated Keith Thurman.
WBC champion is undefeated Floyd Mayweather.
IBF champion is undefeated Shawn Porter.
WBO champion is undefeated Timothy Bradley.
All of these are just welterweight champions.
What does this say about boxing?