What a mess.

The Philadelphia Eagles went from having one of the deepest and most talented rosters in the league to one of the most disappointing seasons this year. Head coach Chip Kelly is at the forefront of this mess because he has so much power within the organization. Kelly and Bill Belichick are the only two people in the NFL who are both head coaches and general managers of their teams.

And there is the problem.

Kelly is a smart guy. He knows how to coach football, but that doesn't mean he knows player personnel. This isn't Oregon where you can simply recruit the best high school players on a 105-man roster. This is the NFL where mistakes are felt bigger and harder when you make them. Kelly isn't a bad head coach, he's just a poor general manager.

Where does one even begin? Perhaps it all started in March of 2014 when the Eagles released star wide receiver DeSean Jackson. No, the Eagles didn't trade away Jackson and get big value in return, they just released him for nothing. Last season Jackson had over 1,110 yards, and this year he has helped guide the Washington Redskins to a first place finish in the NFC East. What kind of a general manager would just release the best deep threat in the league at only 27 years old?

Speaking of wide receivers, letting Jeremy Maclin walk in free agency has proven to be the wrong move. Maclin leads the Kansas City Chiefs with 1,034 receiving yards and is just one catch away from tying his career high. The Eagles passing attack has struggled big time this season. Not a single wide out has over 1,000 yards, and only two players on the entire team have over 400 receiving yards this entire season. Maybe even more disturbing, Riley Cooper has the second most receiving yards of any Eagles wide receiver with just 327 yards. That's just 21 yards per game.

Then there's the quarterback situation. Former No. 1 overall pick Sam Bradford hasn't been terrible this year, but he's not as productive as Nick Foles was. Foles is obviously struggling mightily with the St. Louis Rams, but he did fit the Eagles system very well. Let's also not forget the Eagles gave up a 2016 second-round draft pick just to get Bradford, for whatever reason.

Releasing guard Evan Mathis back in June hasn't helped the Eagles offensive line in any way.

Without a doubt the biggest blunder of Kelly's general managerial career dealt with the running back position. Kelly decided to trade away LeSean McCoy to the Buffalo Bills in exchange for linebacker Kiko Alonso. Alonso didn't play a single game all of last year because of a torn ACL, but Kelly somehow thought he would be more valuable than McCoy. Alonso (who played for Kelly at Oregon) has been injured this year as well.

But it doesn't end there. Kelly's gaffe with the running back position is just beginning. McCoy looked to be an afterthought because Kelly and the Eagles swooped in and signed free agent running back DeMarco Murray. The Eagles were back in business, right? Wrong. After leading the league in rushing yards last season with 1,845 yards, Murray has just 633 this year, the lowest of his career. Murray is only averaging 3.5 yards per carry, also the lowest of his career. Murray is a North runner, but Kelly is trying to run him East and West, college style. That's been a complete disaster from the very beginning of this season. In addition to not using Murray correctly, the Eagles are still in debt to the running back for the next four years thanks to Kelly.

It's amazing Eagles owner Jeffrey Lurie gave this much control to Kelly. He never even gave Andy Reid this much control over player personnel despite making it to five NFC Championship games. Kelly is trying to fit square pegs into round holes and it's just not working.

Follow Damon Salvadore on Twitter @DamonSalvadore1