Many teams in the NFL are led by the consistently strong performance of a particular unit. Equally, other teams around the league are frequently undermined by the mistakes of a positional group rated higher than they should be.
There are those franchises who live or die by the play of their defensive line or the effectiveness of their wide receivers.
Some clubs have units on their team loaded with star names who don't always deliver the production they are capable of.
Here is a list of 10 positional units. The first five are those that are the most underrated in the league. These are followed by the five groups that are the most overrated by those within the game.