Bills Digest is the official publication of the Buffalo Bills. We publish 22 issues per year. Bills Digest will cover the team all offseason as we enter a new era. Under new head coach Doug Marrone, the Bills are expected to make several changes on both sides of the ball at key positions – including quarterback. Who will be under center for the 2013 Bills? We’ll take a look at all the different possibilities throughout the offseason. Buffalo’s defense is also expected to bounce back after a disappointing 2012 campaign under new defensive coordinator Mike Pettine. Pettine has strong credentials after serving as defensive coordinator of the New York Jets the past four seasons.