Which football player is most important to his NFL team?

Peyton Manning. By the far the most valuable player to his team. He is pretty much the offensive coordinator, calls the plays checks the plays he does it all. And he does it all with a very suspect team around him, at least suspect to be undefeated this late in the season. There is not one other player in the NFL who would have an undefeated team this late in the season with receivers like Austin Collie and Pierre Garcon, not to mention having little to no running game.