Much has been made of the Rockies eight day layoff before the World Series. This article considers it unprecedented:
Colorado's eight-day layoff before starting World Series play the longest in history. The previous longest drought was six days - by the 2006 Detroit Tigers, 1996 New York Yankees and the 1995 Atlanta Braves. Both the Yankees and Braves won.
That would be true if the 1910 season never existed. That year, AL Champion Philadelphia finished up its regular season on October 6 with a loss to the Yankees, 3-1. But the National League season kept going. And going. The pennant-winning Cubs played their last game on October 15 with a 4-1 win against St. Louis.
The World Series got underway on October 17, a layoff of 10 days for the Athletics. A layoff that didn't bother them too much as they waxed the Cubs in five games for the franchise's first World Series title.
In 1911, the Athletics finished their season on October 6 and the World Series didn't start until October 14, a layoff of seven days. The Athletics won that series too. That six game series, because of rainouts, did not conclude until October 26.