Jack Costello Stats & Bio | Padres Third Base

About Jack Costello

Jack Costello is a third baseman for the San Diego Padres, wearing number 8 with a combination of athleticism and determination that has defined his path to professional baseball. Standing 6'1" and weighing 205 pounds, Costello brings a physical presence to the hot corner that commands attention on both sides of the ball. Born on May 17, 2001, in Thousand Oaks, California, he developed his game close to home before honing his skills at the University of San Diego, where his talent caught the eye of professional scouts. His California roots and college experience have shaped him into a composed, fundamentally sound player who approaches the game with maturity beyond his years. Costello represents the next generation of Padres talent, and the organization is excited about his continued development.

Updated: Mar 5, 2026