Who's ready for some advance stats? Let's talk about how to evaluate quarterbacks. Take a look at Adjusted Yards per Attempt: 

 

AY/A - (pass yards + 20*(pass TD) - 45*(interceptions thrown))/(passing attempts).

 

This stat has proven to be very indicative of quality QB play over time. Where as more common stats like yards per attempt and quarterback rating can be misleading and/or have arbitrary multipliers, AY/A tells us ho...