Oswaldo José Guillén Barrios (Spanish pronunciation: [gi'?en]; born January 20, 1964) is a Venezuelan former professional baseball player and manager.
He played in Major League Baseball as a shortstop for 16 seasons, primarily with the Chicago White Sox, from 1985 to 2000.
He then managed the White Sox from 2004 to 2011 and the Miami Marlins in 2012.
As a player, Guillén was respected for his passion, speed, hustle, intensity and defensive abilities and his ebullient love for the game.
In 2005, Guillen became the first Latino manager in major league history to win a World Series when he captained the Chicago White Sox to their first championship in 88 years.