Castro started his collegiate career at Washington for two seasons before transferring to San Diego State, where he earned All-Pac-12 honors in 2021 and 2022. The Spanaway native became the first Aztec goalkeeper since 2006 to be named All-Pac-12 First Team in 2021 after starting all 17 matches and allowing just 16 goals with seven shutouts. He earned All-Pac-12 Second Team honors in 2022 after recording three shutouts in 16 starts.
Castro joined Sounders FC Academy in 2017 and made four appearances for Tacoma Defiance as an amateur. Before joining Sounders FC Academy, Castro earned All-State honors as a junior at Spanaway Lake High School, where he also played wide receiver on the football team for two seasons.
Signed as a Homegrown Player on December 13, 2022.
