Miller akashanda semurairidzi mukuru weUSA varume vari pasi pemakore gumi nemapfumbamwe vechidiki timu yenyika, iyo yakakwikwidza ku2015 FIBA Under-19 World Championship
. Chikwata cheU.S.A. chakapedza chine chinyorwa chakakwana che 7<unk>0 uye menduru yegoridhe. Somugumisiro uyu kuita, Miller akanzi co-National murairidzi wegore kubudikidza USA Basketball. Akatsiviwa muna 2017 neshamwari yake yepedyo John Calipari semurairidzi mukuru, achipedza makore ake maviri.