Billy Barrett is a 5'8", 185-pound running back from Mountain Lakes, New Jersey, where he attended Mountain Lakes High School. As a senior, he accumulated over 1,000 yards of total offense with 12 touchdowns and earned first-team all-conference honors. He also competed in lacrosse and holds the school record for total weight lifted at 1,650 lbs across squat, bench, deadlift, and clean. Barrett joined Boston College as a true freshman in June 2026. His father graduated from Boston College in 1994.