Which Yankees hitters changed the most in 2018?

Baseball players are dynamic. Not all in the way that, say, Javier Baez is dynamic, but in that their performance can change dramatically. Now, many year-to-year changes in performance can be chalked up to variance, or to a guy just having an off season. Most of the time, when a player sees a fluctuation in performance, it’s not actually because he suddenly became a completely different athlete.

Sometimes, though, players can change fundamentally, or at least perform in a way that’s clearly different from the past. In prior years, I’ve analyzed the Yankees that changed the most. Last year, I wrote about how Aaron Judge changed in terms of his contact ability, and how Didi Gregorius became a…