Mezue ahịrịokwu na-esonụ: Tupu ịmalite oge mbụ ya na Purdue, na June 18, 2015, a mara ọkwa Swanigan dị ka onye so na ndị otu 12-nwoke 2015 USA Basketball Men's U19 World Championship Team maka
2015 FIBA Under-19 World Championship nke meriri nrite ọla edo na Heraklion, Crete. N'ịbanye n'òtù ahụ, Swanigan kwuru, "M na-esetịpụrụ onwe m ihe mgbaru ọsọ mgbe niile. Etinyere m ihe mgbaru ọsọ maka oge opupu ihe ubi a. Otu n'ime ihe mgbaru ọsọ m bụ isonye n'òtù egwuregwu a iji kwụsị ọrụ ụlọ akwụkwọ sekọndrị m". Iji kwadebe maka egwuregwu ahụ, Swanigan gbara na Nike Hoop Summit, McDonald's All American Game, na Jordan Brand Classic. Swanigan esoghị na Indiana-Kentucky All Star Game ka o wee nwee ike ịga ogige ọzụzụ U-19. Ọ bụ otu n'ime ndị egwuregwu ise na-alọta site na ndị otu U17 meriri nrite ọla edo. Onye otu Swanigan bụ Vince Edwards nọkwa na-agba ọsọ iji mee ka ndị otu ahụ, mana ewepụrụ ya na agba nke 16. Ndị otu ahụ kwụsịrị 7<unk>0, Swanigan na-enwetakwa akara 6.1 na 4.4 rebounds kwa egwuregwu.