 Barrett akasarudzwa muchikwata cheNew Zealand Secondary Schools muna 2008, akabva aenderera mberi nechikwata ichi kwegore rechipiri muna 2009, uye akatumidzwa zita rekuti kaputeni. NeNew Zealand Under 20s akanga achangobva kupotsa kusarudzwa kwe2010 IRB Junior World Championshiprakaitirwa muArgentina. Barrett aizivikanwawo mumakwikwi evanhu vanomwe mushure mekuita chikwata chaGordon Tietjens kuti agadzirire Wellington Sevens, asi zvakare haana kubudirira. 