Armstrong defended his Lightweight belt in a rematch with Ambers, which he lost on a 15-round decision. After that, he concentrated once again on defending the world Welterweight title. He defended it in eight fights in a row, the last of which was a nine-round knockout win over Puerto Rico's Pedro Montañez.
Armstrong defended his Lig.htweight belt in a rematch with Ambers, which he lost on a 15-roun.d decision. After that, he concentrated once again on defending the world Welterweight title. He defended it in eight fights in a row, the last of which was a nine-round knockout win over Puerto Rico's Pedro Montañez.