It was the second straight win in as many games for the Batang Dragons, who gained early lead in Group B.
Tomas Torres added 12 points for Welcoat-Makati, which extended a two-point halftime lead to 45-32 by outscoring the Batang Phone Pals, 19-8, in the third quarter.
Francis Paguirigan tallied 16 points and Brine Ayun added 10 for the Batang Phone Pals, who struggled with their shots in the second half.
Red Bull-San Juan also pulled a lopsided victory against Coca-Cola-HRCSD, 80-37, in the other Group B action.
Danielle Lumahan and Renato Bianzon each scored 10 points apiece for the Barakos, who took a 48-17 advantage at halftime and took away any chance of a comeback by the Batang Tigers by holding Coca-Cola scoreless in the third period.
Kenneth Ducusin showed the way for the Batang Tigers with 14 points.