During the pitching delivery, a pitcher’s total body needs to get to the right place at the right time with the right sequence of movements. The Mustard app looks at all the biomechanical variables of the pitching delivery in a way that is much more accurate than the eyes could ever be.

In a pitching delivery, energy is transferred from the ground up, through the legs and into the torso. Up to 80 percent of that energy is then carried into velocity by angular torque. The final 20 percent of that energy is transferred through linear torque in the torso.

As a pitcher’s shoulders begin to square up toward home plate, the glove needs to swivel so the palm is facing the chest and stabilize over the landing foot, inside the width of the torso, between the shoulders and the belly button.

In just one year, with the help of coach Tom House and Mustard, pitcher Justin Courtney went from training solo in Maine to closing for the Los Angeles Angels Low-A affiliate, the Inland Empire 66ers.

Head position is incredibly important in the pitching delivery. If your head moves too much, you’ll first have difficulty throwing strikes, and you’ll eventually run the risk of injuries from the excessive stress.

A pitcher’s drag line – literally, the line the back foot makes in the dirt - clearly show whether or not your body is where it should be during the pitching delivery.

The easiest way to ensure your biomechanical efficiency is to perfect your timing and stride.