Tuhia he haere tonu mo tenei waahanga - I wikitoria a Barnes i te mētara koura me te United States i te 2017 FIBA Under-16 Americas Championship i Formosa, Argentina i muri i te toharite 9.8 tohu, 3.2 rebounds me te 2.4 tahae mo ia keemu. I roto i te wikitoria haurua-mutunga ki Argentina, i arahi ia i nga kaute katoa me nga tohu 20 me nga tahae e ono i a ia e pakaru ana i te rekoata o Amerika i raro i te 16 mo te ōrau tuku koreutu ma te pupuhi 8-o-8 mai i te raina tuku koreutu. I te 2018 FIBA Under-17 World Cup i Argentina, i toharite a Barnes i te 9.5 tohu me te 5.8 rebounds ia keemu ka mau i tetahi atu mētara koura. He toharite 9.7 tohu, 4.9 rebounds me te 2.7 awhina ia kēmu i te 2019 FIBA Under-19 World Cup
i Heraklion, i Kariki, i riro ai i a ia tana mētara koura tuatoru mo te United States.