Who would have thought heading into the season that guys like Philip Rivers, Cam Newton, Nick Foles and Russell Wilson would be outperforming legends like Tom Brady, Ben Roethlisberger and Eli Manning?
It's this very unpredictability that makes the NFL so great.
For these rankings, every current starting quarterback in the NFL will be considered and valued through numerous categories, each weighted differently as the season progresses.
Each week, I factor in several key attributes for the quarterback position, such as intelligence, arm strength, accuracy, athleticism and leadership.
Wins will also give quarterbacks a slight boost in addition to their individual performances. The statistics used come exclusively from ESPN.com, NFL.com and Pro Football Focus (subscription required) unless stated otherwise. Personal observation and opinion will play a key role as well.
Note: Total QBR is a scoring system that assesses everything a quarterback does on the field. It can be explained further via ESPN by clicking the link above.