Kammala jumla mai zuwa: Castro ya fara bugawa tawagar kwallon kafa ta Mexico wasa a Los Angeles a wasan sada zumunci da Argentina a ranar 4 ga Fabrairu, 2003. Ricardo La Volpe ya buga shi a matsayin Winger na Dama kamar yadda aka saba, amma a matsayin dan wasan tsakiya maimakon mai tsaron gida. Ya buga wasansa na farko a gasar cin kofin duniya da Portugal a Jamus, wasan da Mexico ta yi rashin nasara da ci 2-1. Duk da cewa kungiyar ta rasa wasan, Castro ya taimaka wa kasarsa ta kai zagaye na 16 inda suka buga da Argentina. Tun daga wannan lokacin, an kira shi ya buga wasannin sada zumunta. Har ma an kira shi don yin wasan kwaikwayo na 2007 na
Kofin Zinare da Copa América ga Mexico. Kwanan nan, kocin Mexico Javier Aguirre ya kira shi don gasar zinare ta 2009. Ya zira kwallaye na kasa da kasa ne kawai a kan Amurka a wasan karshe na CONCACAF Gold Cup na 2009.