Depth is key to winning in the National Football League, especially in the salary cap era. One player goes down on a Super Bowl contender, and you can pretty much kiss their chances goodbye.
We saw this with the Houston Texans and Matt Schaub, who had to rely on a late-round rookie to be their starting quarterback in the postseason.
The Kansas City Chiefs saw their entire 2011 season thrown into the scrapheap after losing both Jamaal Charles and Eric Berry before October football began. This story has been repeated over and over again throughout the league.
Today's article is going to focus on the 50 best backups in the National Football League today.
Some Housekeeping: I am defining a backup as someone that doesn't see the field nearly as much as the starters. While Osi Umenyiora is considered a "backup" behind Justin Tuck and Jason Pierre-Paul, he belongs nowhere near this list. I am also going to stop short of predicting serious training camp battles in this article.
All depth chart information courtesy of Ourlads' NFL Scouting Services.