Arash Usmanee (L) of Canada (originally of Afghanistan) is hit by Ray Beltran of Mexico during a 12-round lightweight fight at the MGM Grand Garden Arena in Las Vegas, Nevada April 12, 2014. Beltran won by unanimous decision.  [Photo/Agencies]

Pacquiao's performance righted one of the biggest perceived wrongs in recent boxing history. Pacquiao was an eight-division world champion on 15-fight winning streak when Bradley was awarded a split decision in their last bout.

Pacquiao was more aggressive and accurate from the opening minutes of the rematch, sticking to trainer Freddie Roach's pleas to take the action to Bradley. They exchanged big shots in the opening rounds, but Pacquiao appeared to wear out Bradley with the heavy early pace - and the Pacman never slowed down.

"I didn't want to get careless," Pacquiao said. "I picked up more steam in the second half when I made adjustments that Freddie gave me in the corner. Bradley was much better than in the first fight we had. He hurt me on the chin."

Pacquiao landed a series of big left hands in the early rounds, knocking back Bradley with gusto. Bradley responded impressively in the fourth round, wobbling Pacquiao twice with a right hand.

The pace slowed in the fifth, with Bradley showing off his defense and movement while Pacquiao attempted to trap him against the ropes.

Pacquiao appeared to wobble Bradley late in the seventh round with a vicious combination, but Bradley stood with his back against the ropes and defiantly encouraged it, blocking most of the shots. Bradley appeared to pretend to have wobbly legs at one point after a Pacquiao miss, but his open mouth betrayed his weariness while Pacquiao steadily racked up rounds midway through the fight.