Olmin Leyba – The Philippine Star October 3, 2022 | 12:00am MANILA, Philippines — Rookie Gian Mamuyac shone bright with 17 second-half points as Rain or Shine tripped skidding Terrafirma, 106-94, for back-to-back wins in the PBA Commissioner’s Cup last night at the Smart Araneta Coliseum. Returning to action after missing the team’s 93-71 ambush of Barangay Ginebra due to flu, delivered key baskets and free throws in the stretch that sparked the Elasto Painters to their breakaway. At 2-1 overall, ROS grabbed a share of third with NorthPort behind unbeaten leader Bay Area Dragons (3-0) and seco…