As part of the trade block AI, I wrote some stuff that will compare your team roster value against what a new depth chart would be if you removed a player. The idea is to get a number that represents the loss of a player.
As it turns out, my favorite player on the Treefrogs (franchise RB/KR Faulkner) has the same roster value difference as my #4 OL.
ouch.
However, my most valuable players are my two starting tackles. Eddy and Mathew. Nice.