Freddie Freeman isn’t really sure where the change came from. He just knew that, after a slow start to the season, something needed to be done. Small adjustment has Freddie Freeman hitting at a high level again. Getty Images A week ago, the former MVP was batting more than 40 points below his typical .300 standard. So, during the Dodgers’ recent road trip in Houston, he started toying around with a new stance in the box.  He turned his front foot inward, à la Corey Seager. He focused on keeping his front hip from flying open, in an effort to stay squared up longer. His goal was to drive the ball on a line to left field again –– and not just slap it –– the way he’s done his whole 17-year career.…