If anyone needs another reason to worry...one has to go back to the 2007 Red Sox to find a World Series champion that was swept in a series in September (they were aced in an away series against the Blue Jays on 17th-19th of that month).
Since then:
2008 Phillies - last swept 11th-14th August at Dodgers
2009 Yankees - last swept 10th-12th July at Angels
2010 Giants - last swept 28th-30th June by Dodgers
2011 Cardinals - last swept 22nd-24th August by Dodgers
