Timothy Bradley (green gloves) and Manny Pacquiao (red gloves) box during their WBO World Welterweight Title bout at MGM Grand Garden Arena. Pacquiao won via unanimous decision.  [Photo/Agencies]

Bradley came on strong in the 12th, and the fighters' heads collided late in the round. Pacquiao avoided any trouble until the final bell, when he did a short dance step to his corner.

While Bradley remains publicly confident he beat Pacquiao in their first bout despite fighting on two injured feet, that much-derided decision sent both fighters' careers on wild spirals.

The two judges who scored the bout 115-113 for Bradley are no longer in the boxing business, but their decision ended Pacquiao's 15-fight win streak and forced Bradley to defend himself against widespread criticism of the result.

Bradley endured death threats and depression before returning to the ring in unusually reckless style. He brawled with Ruslan Provodnikov in March 2013 in a sensational unanimous-decision victory that silenced critics of his style and heart. Bradley then outpointed veteran Mexican champion Juan Manuel Marquez last fall, polishing his skills and making himself attractive to Pacquiao for a rematch.

Pacquiao was knocked unconscious by Marquez in the sixth round of their fourth fight in late 2012, and he took nearly a year off before returning for an unspectacular victory over Brandon Rios last fall. Pacquiao's last two performances prompted Bradley to declare Pacquiao had lost his killer instinct, noting he was unable or unwilling to stop any of his opponents since late 2009.