Mezue ahịrịokwu na-esonụ: A mụrụ Rojas ma zụlite ya na Chile. Ọ malitere ọrụ ya na 1976 na klọb Chile Aviación. Rojas gara n'ihu na-egwu maka Colo-Colo site na 1983 ruo 1987. Na Colo-Colo, Rojas meriri aha mba na 1983 na 1986. Na 1987, mgbe ihe ịga nke ọma na-arụ ọrụ na
Copa América, ọ kwagara São Paulo nke Brazil ebe ọ nọrọ ruo 1989. N'afọ 1987, Michel Preud'homme, onye FIFA weere dị ka onye na-eche nche kachasị mma n'ụwa, kwupụtara maka magazin German 11freunde na: "Roberto Rojas ka m mma". Mgbe ọ lara ezumike nká ọ laghachiri São Paulo ka ọ bụrụ onye nkuzi goolu, na-azụ Rogério Ceni. N'afọ 2003, Rojas jere ozi dị ka onye nchịkwa oge na-adịghị anya ma duru ndị otu ahụ na Copa Libertadores maka oge mbụ kemgbe 1994. O mechara bụrụ onye nkuzi goolu maka otu egwuregwu Brazil Sport Club do Recife.