1. Marvin Hagler
After losing to Bobby Watts and Willie Monroe in 1976, Hagler went on to become the world middleweight champion in 1980 and make 12 defences of the crown. Arguably the best middleweight of all time, Hagler defeated Thomas Hearns, Roberto Duran, John Mugabi and Vito Antuofermo after winning the belt against Alan Minter.
2. Pernell Whitaker
Whitaker, a defensive wizard who tragically passed away in July, became IBF world lightweight champion in 1989, grabbed Jose Luis Ramirez’s WBC belt that same year, and eventually won the WBA version as well. In 1993, he moved to welterweight to lift the WBC belt before adding the WBA super-welterweight title in ’95.
3. Manny Pacquiao
Quite incredibly, Pacquiao began his career as a 106-pound light-flyweight before moving through the divisions and winning world titles all the way up to super-welterweight. Along the way he has beaten Juan Manuel Marquez, Marco Antonio Barrera, Erik Morales, Oscar De La Hoya, Miguel Cotto and Shane Mosley.