Rubuta ci gaba don wannan sakin layi - Kafin fara kakar wasan farko a Purdue, a ranar 18 ga Yuni, 2015, an sanar da Swanigan a matsayin memba na 'yan wasan 12 na Amurka na Kwando na maza na U19 na Duniya don 2015 FIBA Under-19 World Championship
wanda ya lashe lambar zinare a Heraklion, Crete. A kan shiga cikin tawagar, Swanigan ya ce, "A koyaushe ina kafa maƙasudai ga kaina. Na kafa maƙasudai don wannan bazara. Daya daga cikin burina shi ne in shiga wannan kungiya domin in kawo karshen sana'ata a makarantar sakandare". Don shirya wasannin, Swanigan ya taka leda a Nike Hoop Summit, McDonald's All American Game, da kuma Jordan Brand Classic. Swanigan bai shiga cikin Indiana-Kentucky All Star Game don ya iya halartar sansanin horo na U19 ba. Ya kasance daya daga cikin 'yan wasa biyar da suka dawo daga tawagar U17 da ta lashe lambar zinare. Abokin wasan Swanigan Vince Edwards shima yana cikin gudu don shiga kungiyar, amma an yanke shi a zagaye na 16. Teamungiyar ta gama 7<unk>0, kuma Swanigan ya kai maki 6.1 da 4.4 a kowane wasa.