Article about the stats explosion across the NFL.
http://www.greenbaypressgazette.com.../10/11/sorting-nfls-stats-explosion/17124479/NFL teams have been working with analytics for a while now — the Packers hired Mike Eayrs as director of research and development in 2001 — but the level of sophistication is just beginning to take off. Aside from the work teams do in their research departments, there now are league-wide databases available to fans and teams alike at websites such as Pro Football Focus, Football Outsiders, Advanced Football Analytics, Stats and CHFF, among others.