With Chip Kelly at the helm, the 2013 Philadelphia Eagles have the potential to be one of the league's most dynamic offenses.
LeSean McCoy, DeSean Jackson and Jeremy Maclin are all young and in the primes of their careers. Brent Celek and Zach Ertz should be a top tight end duo, while James Casey is a versatile H-back. The offensive line could be spectacular if Jason Peters, Jason Kelce and Todd Herremans can all return successfully from injuries.
The great unknown will be the quarterback position. It's essentially a three-way race between Michael Vick, Nick Foles and Matt Barkley, although Barkley is much more of a long shot than the others.
Should the quarterback position backfire, it could drastically affect the rest of the offense. The running game won't be as efficient, the receivers won't put up as many yards, and there will be significantly more pressure on the defense to keep the Eagles in games.
Here's a look at both the best- and worst-case scenarios for this year's Eagles, broken down by player.