The conversation around baseball hitting mechanics has changed considerably in recent years, with the popularization of tracking data for exit velocity and launch angle. Though more granular than mainstream offensive baseball stats like batting average and home runs, those numbers similarly remain a measurement of results, not process.
Now, a dozen major league clubs and several training complexes, such as Driveline Baseball in suburban Seattle, are turning to a wearable technology that got its start in golf to help learn about how each player moves, rather than just what happens to the ball. K-Motion produces a tracking vest that captures and quantifies the biomechanics of a swing.