Pedzisa mutsara unotevera: Alfaro akaita kutanga kwake kuCosta Rica mumutambo waApril 1991 wokushamwaridzana neMexico uye akawana huwandu hwe27 caps, achiwana 1 chinangwa. Akamirira nyika yake mumitambo mishanu yekukodzera yeFIFA World Cup uye akatamba mu1999 UNCAF Nations Cup uye
Copa América ya1997.