No one would argue that starting quarterback is the single most important position on any NFL team, but oftentimes the quality of the backup signal-caller is also of paramount importance. It's what makes quarterbacks like Matt Moore (Dolphins), Matt Hasselbeck (Colts) and Kyle Orton (Cowboys) so valuable.
Now, this list is about the best backup quarterbacks, so I am in no way, shape or form intimating that I would be comfortable with anyone on this list being my team's starting quarterback for 16 games.
I rank backup quarterbacks based on my confidence level on them to get the job done in a pinch. What if the starter sprains an ankle and needs to come out of a game? What if the starter sustains a concussion and must miss a few games? How much trust would you have in the backup to come in and potentially win a few games in his stead?
That's what separates the great backup quarterbacks from the average ones: The ability to steer the ship successfully for an undisclosed period of time while the starter gets healthy or returns to form.
With that said, here, in no particular order, are the 10 best backup quarterbacks in the NFL, with apologies to Jason Campbell (Browns), Kevin Kolb (Bills) and Nick Foles (Eagles), who just missed the grade.