pacquiao won titles at 7 weights, but probably 10 different belts.
in what-boxing,tennis,ice-skating?
Charles "Sonny" Liston, in 1964.
george foreman. Won the title at age 45
Hector Thompson
Kennedy McKinney did it. He also won the IBF junior featherweight title as a professional as well as the WBO super bantamweight title.
Frankie Genaro of the United States who won gold in the flyweight class at the 1920 Games in Antwerp and then won the American flyweight title in 1923 and the National Boxing Association version of the world flyweight title in 1928.
Torpedo Billy Murphy won the featherweight title in 1890
3 times, '64, '74, '78.
Oscar De La Hoya. EDIT Manny Pacquiao has won titles in 7 divisions, beating Oscar's record.
he won the wba junior lightweight title in 1986, and the ibf title in 1991, and never lost either in the ring.
Las Vegas
wbc is the 'world boxing council' :)