One of the first things that new head coach Chip Kelly did was make it obvious that no one on the Philadelphia Eagles has his starting spot guaranteed, as he became notorious for using many players on the first-team offense during OTAs, and vice versa.
From the quarterback competition to the likely battles on the defensive line to the potentially revolving door at secondary, no one can enter camp completely assured of a starting spot.
Now a number of players will clearly enter the 2013 season as the starter. LeSean McCoy is the running back. DeSean Jackson and Jeremy Maclin are the top two receivers. Jason Peters is the left tackle. I could go on and on.
But a careful look at the roster reveals how many players from last year's team are not guaranteed a spot on the team. After all, that's what happens when a team goes 4-12 and ranks 30th in the National Football League in scoring differential.
The following slides will highlight a number of players who are right on the roster bubble right now.