2010-11: Beau Starrett saw limited action and had no points as a freshman at Catholic Memorial HS in Massachusetts. His older brother Shane Starrett was a goalie for the Knights and Beau became the fourth Starrett brother to play for Catholic Memorial.
2011-12: Starrett played for the South Shore Dynamos U16 team in the Massachusetts Midget Select League and skated for Catholic Memorial as a sophomore. In 12 games for the Dynamos he scored 5 goals with 4 assists and 6 penalty minutes.
2012-13: Starrett played for the South Shore Kings — skating in 18 games for the club’s Empire Junior League team and playing for the U18 squad — and skated for Catholic Memorial as a junior. He scored 11 goals with 11 assists and 20 penalty minutes in Empire league play and scored 9 goals with 8 assists for Catholic Memorial.
2013-14: Starrett skipped his senior year of high school hockey at Catholic Memorial to play junior hockey for the South Shore Kings in the first-year US Premier Hockey League. In November he committed to playing college hockey at Cornell in 2014-15. Starrett scored 11 goals with 36 assists and 94 penalty minutes in 48 regular season games and had 1 goal with 2 penalty minutes in five playoff games. He was selected to play in the USPHL Premier Division all-star game along with teammates Nolan Vesey and Joe Lappin. Starrett was ranked 79th amongst North American skaters in Central Scouting’s final rankings prior to the 2014 NHL Draft.