 Rambai muchinyora ndima iyi - Clark akasimudzirwa kuchikwata chenyika cheUnited States U20 pakutanga kwa2002, achiwana kapu yake yekutanga padanho iri musi wa10 Ndira sechikamu che 10 kukunda Canada. Akatumidzwa zita muchikwata che2002 C.O.T.I.F. XIX Torneig Internacional, achibatsira maAmerican kuti apedze zvakanakisa; vakakundwa neBrazil mumutambo wekupedzisira. Clark akavhara 2002 paCONCACAF U20 qualifying tournament, achibatsira United States kuti ikwanise kuenda ku2003 FIFA World Youth Championship. Mushure mekuonekwa ka28 kuU20s muna 2002, Clark akaenderera mberi achitamba mimwe mitambo 19 muna 2003, kusanganisira kumwe kuoneka muLAlcúdia. Mitambo yake yekupedzisira pamatanho eU20 yakauya muUnited Arab Emirates kuWorld Youth Championship, uko Clark akatamba mitambo mishanu yese yevaAmerican. Kuonekwa kwake kwechi47 uye kwekupedzisira kweU20s kwakauya mukukundwa kwekota yekupedzisira neArgentina musi waDecember 12. 