I'm suspicious if the White Sox can keep it up, for two reasons.  One, their pythagorean record was 91-71, eight games below their real record.  The Indians actually had a better run differential, and they will pose a significant challenge.  Second and more importantly, quite a few Sox pitchers enjoyed career years.  Jose Contreras, Mark Buehrle, Jon Garland, Neal Cotts, Dustin Hermanson, Cliff Politte and Bobby Jenks all enjoyed the best years of their careers.  How much of that is real, how much is a fluke, and how much is defense?  The Sox remind me a great deal of the 1939-40 Cincinnati Reds, who won two NL pennants and a World Championship almost entirely on pitching and defense.  It worked for a time, but Bill McKechnie remained obsessive far beyond its usefulness. 
 
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Weren't the Yanks a lot better than their pythagorean during their championship years from 96 to 00?