http://espn.go.com/mlb/story/_/id/9749026/oakland-athletics-success-due-player-chemistry-not-metrics-espn-magazine
Talks about team chemistry...
Excerpt: We had Bezrukova and Spell run a fault-line analysis of this year's A's roster, along with that of the 2013 Angels, preseason favorites to take the division. The researchers found a big gap in Oakland's favor and signs of isolation in the Angels' clubhouse. Without talking to a single player, scouting a single fastball, looking at a single stat or really even knowing all that much about baseball, the researchers would have predicted that the Angels would disappoint and the A's would exceed expectations. Which is exactly what's happened this year.