Mezue ahịrịokwu na-esonụ: Na Mee 21, 2013, USA Basketball kwupụtara ndepụta nke ndị egwuregwu 24, gụnyere Okafor, bụ ndị nabatara ọkpụkpọ òkù na June 14<unk>19, 2013, USA Basketball Men's U19 World Cup team training camp. E ji ogige ahụ họpụta ndị otu mmadụ iri na abụọ maka asọmpi nke June 27 <unk> July 7,
2013 FIBA Under-19 World Championship na Czech Republic. Okafor mere ndepụta ikpeazụ nke ekwuputara na June 18. Ndị otu ahụ meriri nrite ọla edo, ma Okafor mere ndị otu egwuregwu niile, yana onye otu ya na asọmpi MVP Gordon. O duziri asọmpi ahụ na pasent 77% nke mgbaru ọsọ ubi, ọ bụkwa naanị onye ọkpụkpọ na Team All-Tournament nke ga-alaghachi ụlọ akwụkwọ sekọndrị. Otú ọ dị, ndị nkuzi Billy Donovan na Shaka Smart gwara ya na ihe na-adịghị ike ya bụ ọnọdụ ya.