After Oscar Mejia staked UP to a 1-0 halftime lead, the Maroons exploded for two more goals to beat University of Santo Tomas, 3-1.
Randy Salisad sparkled with four goals as the Army B booters blasted Korea Football Association, 6-0.
Salisad struck in the eighth, 37th, 65th and 71st minutes.
Four other matches in the tourney organized by Army, sponsored by Utilco and sanctioned by the Philippine Football Federation all ended in draws.