The 2005 World Series was the championship series of Major League Baseball's (MLB) 2005 season. The 101st edition of the World Series, it was a best-of-seven playoff between the American League (AL) champion Chicago White Sox and the National League (NL) champion Houston Astros. The White Sox swept the Astros in four games, winning their third World Series championship and their first in 88 seasons. Although the series was a sweep, all four games were quite close, being decided by two runs or fewer. The series was played between October 22–26, 2005.