Bradley's split decision in Las Vegas Saturday was greeted by incredulity far and wide. The WBO acted after Bob Arum, the chairman and chief executive officer of Top Rank, the promoter for both fighters, requested the inquiry on the judges' scoring Monday.
Judges Duane Ford and C.J. Ross scored the bout 115-113 for Bradley and Jerry Roth recorded it 115-113 for Pacquiao.
Bradley (29-0, 12 KOs) ended a 15-fight winning streak for Pacquiao (54-4-2, 38 KOs).
WBO President Francisco "Paco" Valcarcel said the organization's championship committee will meet soon to review the fight "with five recognized international judges to evaluate the video of the match and agree to what emerges."
"I want to clarify that in no way this says that we are doubting the capacity of these judges, which we consider as honest and competent judges," Valcarcel said.
The WBO could order a rematch if it decided the outcome was flawed. Pacquiao's contract included a rematch clause, guaranteeing him a second fight regardless.
Wisconsin business offering 'therapeutic cuddling' forced to close
Exploding whale video goes viral on Internet