Below, Matt Williamson, of Scouts Inc., at espn.com, breaks down the four quarterback that will be playing in this weekend's conference championship games.

Quarterback Ben Roethlisberger #7 of the Pittsburgh Steelers throws a pass against the Baltimore Ravens in the AFC Divisional Playoff Game at Heinz Field on January 15, 2011 in Pittsburgh, Pennsylvania.

Courtesy---Matt Williamson/Scouts Inc./espn.com

The four quarterbacks leading their respective teams into the conference championship games Sunday are very different. Each poses a unique challenge for the opposing defensive coordinator. Let's examine each player's strengths and then look at how the opponent should attack the QB to throw him off his game.

http://sports.espn.go.com/nfl/playoffs/2010/news/story?id=6034674