Whitaker relinquished all of the belts after moving to the junior welterweight division .
Whitaker , the unified IBF and WBC champion , won Juan Nazario 's WBA belt becoming the undisputed champ .
champion relinquished all of the belts after moving to the junior welterweight division .
Whitaker , the unified IBF and WBC champion , won Juan Nazario 's WBA belt becoming the undisputed champ .