Rojas represented Chile at under-20 level in 1993 alongside players such as Claudio Lizama, Claudio Villan and Marcelo Salas.
ɹˈoʊhɑːs ɹˌɛpɹᵻzˈɛntᵻd tʃˈɪli æɾ ˌʌndɚ twˈɛnti lˈɛvəl ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti θɹˈiː ɐlˈɔŋsaɪd plˈeɪɚz sˈʌtʃ ɐz klˈɔːdɪˌoʊ lɪzˈɑːmə, klˈɔːdɪˌoʊ vˈɪlən ænd mɑːɹsˈiːloʊ sˈɑːləz.