FILE -  In this Monday, Dec. 12, 2016 file photo, New England Patriots quarterback Tom Brady passes against the Baltimore Ravens during the first half of an NFL football game in Foxborough, Mass. It's not a coincidence that four superior quarterbacks are the final four left chasing a Super Bowl title. The AP examines a couple of the reasons why Tom Brady, Ben Roethlisberger, Aaron Rodgers and Matt Ryan are as good as they are, and looks at the weakness an opponent should try to exploit, Wednesday, Jan. 18, 2017. (AP Photo/Charles Krupa, File)
{}