http://www.pi-football.com/2011-12_predictions.aspx
http://www.premiersoccerstats.com/wordpress/
Soccer Bayesian Modeling, See page 21 -> http://www.eecs.qmul.ac.uk/~norman/papers/pi-football%20%20A%20Bayesian%20network%20model%20for%20forecasting%20Association%20Football%20match%20outcomes.pdf
Nate Silver's Power Index -> http://espnfc.com/spi/rankings?cc=5901
Network theory applied to soccer -> http://www.technologyreview.com/view/428399/pagerank-algorithm-reveals-soccer-teams-strategies/ -> http://arxiv.org/pdf/1206.6904v1.pdf
Are there exisiting data sets like the "Lahman" R package for baseball stats? Where can we scrape data?