The Chicago White Sox's first world championship in 88 years was also the lowest-rated World Series ever. Chicago's four-game sweep of the Houston Astros averaged an 11.1 national rating with a 19 share on Fox. That's down about 7 percent from the previous low, an 11.9 with a 20 share for the 2002 World Series between the Anaheim Angels and the San Francisco Giants. While the 2002 World Series, which went seven games, rated higher overall, it was only averaging an 11.0 through four games. This year was a drop of almost 30 percent from last year's series, in which the Boston Red Sox swept the St. Louis Cardinals for their first title in 86 years. That had a 15.8 rating with a 25 share. Wednesday night's 1-0 Chicago win had a 13.0 preliminary national rating with a 21 share. It was the highest-rated prime-time show on Fox since the final of "American Idol" in May, but still not enough to save the series from being the lowest-rated.