 Nyorai mberi kweiyi ndima - Osorno akadanwa nokuda kwechikwata chenyika yeMexico cheU-20 muna 1999. Gare gare mugore iroro akaita kutanga kwake nechikwata chenyika yeMexico, vachipesana neCroatia musi wa 16 Chikumi 1999. Akatamba mumakwikwi akawanda epasi rose neMexico, kusanganisira makwikwi matatu eCopa América: 1999, 2001, uye 2004. Osorno aiva nhengo yechikwata chakarova Brazil mu1999 FIFA Confederations Cup, asi haana kuona nguva yekutamba mumutambo iwoyo. Akarasikirwawo ne2002 FIFA World Cup, kwaaive mumwe wevatambi vekupedzisira kudonhedzwa muchikwata nemurairidzi Javier Aguirre. 