Mario David Quiroz Villón (born September 8, 1982, in Guayaquil) is an Ecuadorian Association footballer.
On 10 December 2011 Quiroz was transferred to Mexico club Atlante FC.
Quiroz is seen as a promising player; he has played for the Ecuador national team and made his beginning appearances against Sweden.
His next international appearance was in a friendly against Ireland in the Giants Stadium, New York City.
He has seen playing time so far in Ecuador's 2010 World Cup qualifying tournament, starting in the 5–1 win over Peru in Quito.