He slowed down with an 80 in scorching conditions after a 76 but still won by 22 strokes on a 156 total over 36 holes.
Anthony Avila carded an 88 to finish a distant second at 178, while Joaquin Limjap took third with a 199 after a 98.
Ong’s dominant performance catapulted him from No. 6 to No. 4 in the Visayas-Mindanao Series rankings. Accumulating 35 points across the six-stage circuit, he dislodged the absent Thomas Ngo (26) to claim the fourth and final qualifying spot. Ong thus joined Ethan Lago, Stephen Clementer and Lucas Revilleza to form the South’s youngest squad, ready to battle the North side on 17 to 20 August at the Pueblo de Oro Golf and Country Club.
“I’m so excited to play in the grand finals. I’m going to practice hard to turn my weaknesses into strengths, but my goal is to keep playing pressure-free,” the nine-year-old Ong said.