On 14 June 2008, Ruiz broke Juan Carlos Plata's all-time individual goal-scoring record for Guatemala by scoring four goals against Saint Lucia in Guatemala's 2010 World Cup qualification opening match. Ruiz had scored 39 goals, four more than Plata's total. Ruiz also became the first Guatemalan player to score four goals in a World Cup qualification match. On 10 September 2008, Ruiz scored two goals against Cuba in Guatemala's 2010 World Cup qualification in the 3rd match of the 3rd round of qualification of the CONCACAF region. Those two goals extended his all-time individual scoring record for Guatemala to 41 goals, six more than Plata's total.