Mezue ahịrịokwu na-esonụ: Na June 18, 2015 a mara ọkwa Brunson dị ka onye so na ndị otu 12-nwoke 2015 USA Basketball Men's U19 World Cup Team maka
2015 FIBA Under-19 World Cup. Brunson nwetara MVP nke asọmpi ahụ, mgbe o duru ndị otu ahụ na 5.6 na-enyere aka na 2.1 na-ezu ohi maka asọmpi ahụ. O tinyere akara 30 kachasị elu na egwuregwu ahụ megide Gris, ma ọ gbakwunyere akara 14 kachasị elu gụnyere 6 na mgbatị oge yana inye aka 7, 5 rebounds na izu ohi na egwuregwu ọla edo megide Croatia. Brunson jikọtara onye otu ya Harry Giles, na nkezi 14.0 maka asọmpi ahụ. Ọ chịkwaa n'egwuregwu abụọ ikpeazụ. Dabere na arụmọrụ a, a mara ya dị ka USA Basketball Male Athlete of the Year, na Disemba 21, 2015.