Oscar De La Hoya - 6 WBO Junior Lightweight title; World WBO, IBF Lightweight titles;
World WBC Junior Welterweight title;
World WBC Welterweight title (failed to win IBF title);
World WBC, WBA Junior Middleweight titles: WBO Middleweight title (failed to win World WBA, WBC, IBF titles).
Thomas Hearns - 5
World WBA Welterweight title;
World WBC Junior Middleweight title;
WBC, WBA Light Heavyweight titles:
WBC Middleweight title (failed to win World WBA, WBC, IBF titles):
WBO Super Middleweight title (failed to win the WBC title in controversial bout).
'Sugar' Ray Leonard - 5
World WBC, WBA Welterweight titles;
WBA Jr. Middleweight title (failed to win WBC title);
World WBC Middleweight title:
WBC Super Middleweight title (failed to win WBO title):
WBC Light Heavyweight title. (Won SMW and LHW titles in same bout).
Floyd Mayweather, Jr. - 5
WBC Junior Lightweight title;
World WBC Lightweight;
WBC Junior Welterweight title;
World WBC, IBF Welterweight titles:
World WBC Junior Middleweight title.
That is kind of a trick question. The most Championship belts held at one time (both Major and Minor) in one division would be Roy Jones Jr with 9 at Light Heavyweight. He held the WBA Super,WBA,WBC,IBF,IBO,IBA,WBF,NBA and Ring Magazine belts at the same time.
Roy Jones Jr.
Manny Pacquiao
Manny "Pacman" Pacquiao
Oddiel Rodriguez
Oscar dela hoya with 6
Manny Pacquiao.
Henry Armstrong was the only boxer to hold titles in three different weight classes at the same time: featherweight, lightweight, and welterweight.
Bob fitzsimmons
1
Baby Jake matlala
Teófilo Stevenson
world titles in 7 divisions. including 3 ring magazine titles, and one other linear title (according to another publication)
Liverpool has the most titles
Erik Morales is a professional boxer from Mexico. He has won world titles in four different weight classes and is the first Mexican-born boxer to do so. He is most famous for his trilogies with Mexican boxing legend Marco Antonio Barrera and Filipino Manny Pacquiao.
tommy hearns