Cruz, 30, crushed Mandy del Rosario, 6-0, with swift, strong sidekicks to the body in the second round, and then used the same weapon to beat Letrans Hector Arellano, 4-0, in their quarterfinal clash.
Another national jin, bantamweight JR Rivero, shared the days honors with Cruz by producing the fastest victory a 30-second knockout of Baguios Gilbert Labio in the quarterfinals.
Rivero, 21-year-old KL SEAG bronze medalist, felled Labio with a slide back counter roundhouse kick to the face, to arrange a semifinal meeting with former national junior pool members Andre Alfie Ablaza of DLSU Taft.
Also making it to the semifinals of the tourney sponsored by Samsung, managed by img and supported by Accel, Colours, Philippine Star, Kix, Ayala Center and 103.5 K Lite were finweight Michael Velo of Baguio, Carlos Padilla (SBC) and Michael Buliyat (Baguio), flyweight Ostacio Soliven (Pangasinan), Reymar Aringo (Laguna), Danrey Velo (Baguio) and Arnold Oglayon (Baguio).
Michael Velo whipped Marlon Ventura, 7-1; Padilla beat USTs Terrence Boteja, 5-2; Buliyat nipped Eugene Patagan, 2-1; Soliven won by default over National Jun Tshomlee Go, who failed to make it due to this studies; Aringo toppled AUFs Mark Francis Aclao, 4-2; Danrey Velo ripped SBCs Bryan Alair 3-1; Oglayon foiled Letrans Rommel Roa, 5-3; and Ablaza topped Baguios Michael Lemon, 3-1.
Action continues today with senior women jins seeing action from the elimination to the final rounds, while senior mens semifinalists continue their battle for the golds.