How can pitchLogic’s metrics be used to improve a pitcher’s game? Chris Fetter, Associate Head Coach and Pitching Coach at the University of Michigan talks with Lary Sorensen about spin efficiency and its application to fastballs, breaking balls, and sliders. Fetter also discusses gyro spin –– what we refer to as Riflespin –– in relationship to spin efficiency and compares it to how a bullet moves through space.