This is the third story in a five-part series that examines how swing biomechanics and the proliferation of technological tools are helping hitters.
Modern technology is able to illuminate the kinematic sequence of a hitter’s swing, but those assessments top out at the athlete’s torso. What happens above the neck is just as critical, and it’s hard not to lean into baseball’s most famous truism of all: Yogi Berra famously said the game is “90% mental,” which makes perfect sense if you ignore that fact that he said the other 50% is physical.