The San Francisco 49ers downed the Seattle Seahawks in Week 1. How did it affect how Kyle Shanahan's team is being viewed in Week 2.

Quarterbacks. They make the NFL go 'round. If money talks, then the league's biggest contracts confirm it: This position is easily the most integral in every team's hunt for a championship. The truth is a bit more complex: Every signal-caller is often only as good as his setup and situation, though a select few register as transcendent talents.

Baltimore's stock has fallen, but it didn't take a significant drop on PFF's power rankings. They slide one spot ahead of Week 2's action from the top spot to the second.