The hardest spot to fill on the field is...
I thought we might take a break from the world-cup breakdowns, and other ruminations, to have a run at a wide-open topic:
What is the hardest position to fill to have a successful team in each of the major sports?
Your categories are:
American Football Offense -
American Football Defense -
I don't think i'm leaving anything out in the cold, major team sport wise.
Have a crack at it in the comments...