With free agency fading in the rearview mirror and the NFL draft less than a month away, ESPN's panel of NFL Insiders -- Mike Sando, Bill Polian, Mark Dominik, Field Yates and Louis Riddick -- have assigned letter grades to each team's performance this spring.
The Buffalo Bills received a very average C grade from the panel, and it's clear that their tight salary-cap situation played a role in that decision.