Kerry Byrne: The most important stat in football: Passer Rating Differential

There are a lot of important statistics in football, but none more so than Passer Rating Differential. Kerry J. Byrne explains the stat, which has been a trademark of several past champs.

Source: http://sportsillustrated.cnn.com/2011/writers/kerry_byrne/06/23/most.important.stat.passer.rating.differential/index.html?xid=si_nfl

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