1. Distrust of Sabermetrics.
    Until recently, they were one of the most old school teams in the league, relying on scouting by intuition, looks, and vanity stats.
  2. Age
    Their core of players from the World Series runs in the last decade are now old or gone. Howard, Utley, Rollins, ...
  3. Terrible depth on the bench
    Which hurts when you hit a patch of injuries.
  4. Coaching turnover