Zaldivar played high school basketball for the Adamson Baby Falcons.
[1] He was a center of the Adamson Soaring Falcons of the University Athletic Association of the Philippines (UAAP), with Jerom Lastimosa playing the point.
[4][5][6] They would later let go of him, leading to his signing of a new contract with the Converge FiberXers on his sophomore year in the professional league PBA.
[7][8] On February 7, 2024, Zaldivar got the most votes from fans for the PBA All-Star RSJ game.
[9][10] On November 12, 2024, Zaldivar was traded to the Terrafirma Dyip along with Aljun Melecio and the 2025 Converge first-round pick for the draft rights of Jordan Heading.