Juan Manuel Márquez

…ring in September 2009 against Juan Manuel Márquez, a natural lightweight and crowd favorite who moved up two divisions to accept the bout. Although Márquez showed great fortitude, the judges awarded Mayweather a unanimous decision after 12 rounds.

…lost a non-title bout to Juan Manuel Márquez—against whom Pacquiao had previously won two fights and drawn another—when he was knocked out in the sixth round. It was the first time Pacquiao had been knocked out since Singsurat did so in 1999. He regained the WBO welterweight belt in April…