Every Year

Why do the Sox do this?
What is it that is built into the infrastructure of the organization that makes us taper off at the end of the season?
I mean we are still 4.5 up right now, but if I remember correctly, we were up 13.5 at one point.
At what is it about the Yankees that makes them go on a friggin tear at the end of every season.
Every year, we are in first place then it shrinks and shrinks.
EVERY YEAR.
I have a love hate thing goin on with that drama.