How to use it

The Clockface gives a quick and easy way to see how Arm Slot and release affect Spin Direction. This allows players and coaches to make small adjustments after each pitch and immediately see the results without breaking their rhythm.

Fastball: If a pitcher is working on improving their fastball’s Spin Efficiency, a separation between the Spin Direction and Arm Slot arrows can indicate cutting the ball. As the pitcher works on keeping their fingers behind the ball through release, watching the blue arrow move toward the yellow arrow is a good gauge of progress.

Breaking ball: For a breaking ball, Arm Slot has a large impact on the shapes of breaking balls that will be possible. A higher Arm Slot (closer to 12:00) allows a pitcher to create more Topspin and a more “12-6” or vertical breaking ball. Pitchers with a lower Arm Slot will be able to create more Sidespin and Horizontal Movement. Pitchers can also choose breaking balls that sacrifice maximum Spin Efficiency and movement to create different Spin Directions (such as a slider).