After 14 bouts (11 wins, 1 loss and 2 draws), he fought Carl Peñalosa for the Philippine lightweight title but lost on points.

Adigue challenged Peñalosa again for the same title on August 2, 1965, but this time won by knockout in the 7th round.

He then won the Oriental and Pacific Boxing Federation (OPBF) lightweight title on September 30, 1966, and defended it five times.

He then won the vacant WBC light welterweight championship in 1968 at the Araneta Coliseum in Quezon City, Philippines, when he defeated Adolph Pruitt.

Pedro died on November 20, 2003, in Rizal Medical Center, Pasig, Metro Manila, Philippines due to metastasized throat cancer.