Hart is a freshman goalie studying in the Morrissey College of Arts and Sciences. He grew up in both Northern and Southern California, and attended St. Ignatius College Prep in San Francisco. In high school, Hart was a member of SI's varsity water polo team for 3 years and also played with Stanford Water Polo Club in the offseason. In his senior season, Hart served as SI's team captain and was selected to the All-Section and All-League teams.