Ulloa akaita mutambo wake wekutanga kuEl Salvador mumutambo wePan American Games waAugust 1987 uchipesana neTrinidad &amp; Tobago uye akawana huwandu hwe31 caps, achiwana zvibodzwa zvisere. Akamirira nyika yake mumitambo 11 yeFIFA World Cup yekukodzera (maari akarova matanhatu) pamwe ne1991 na1993 UNCAF Nations Cup
s.