These ranks are subject to dramatic change as the free-agent and draft seasons advance on us. I'll keep them updated when major NFL personnel changes happen. I also reserve the right to change my mind on hard-to-rank players like Cam Newton and Rob Gronkowski, whom some readers will instantly howl are "too low" at their respective positions.
(If you know my work, you know I tend toward conservative estimates of amazing-season repeatability.) At this point it's all grist for the mill. Let the debates begin!
[Editor's Note: Rankings were updated March 28 to reflect Brandon Jacobs signing with the 49ers.]