I found this story in the August 26th addition of Sports Illustrated about The Swing. Much of the article is about what changes Chris Davis made to his swing to have such a great year. It also gets into the technical aspects of the swing.
SEE BALL, HIT BALL? MASTERING THE - 08.26.13 - SI Vault
SEE BALL, HIT BALL? MASTERING THE - 08.26.13 - SI Vault