Roy Jones Jr. won major world titles in four weight divisions: middleweight, super middleweight, light heavyweight, and heavyweight. He also won an Olympic silver medal at light middleweight, but that was not a professional world title.

Weight divisions

  • Middleweight: IBF title.
  • Super middleweight: IBF title.
  • Light heavyweight: multiple titles, including WBC, IBF, and WBA.
  • Heavyweight: WBA title.

Quick note

He is especially famous for moving up and winning the heavyweight belt after already being a middleweight champion, which is a rare feat in boxing history.

Division Major title(s) won
Middleweight IBF
Super middleweight IBF
Light heavyweight WBC, IBF, WBA
Heavyweight WBA
TL;DR: Roy Jones Jr. got belts in **four pro weight classes** : middleweight, super middleweight, light heavyweight, and heavyweight.