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.

Miami Marlins Draft Pick Joey Steele Loves Mustard, Because It’s Like Having Coach Tom House With Him Every Day

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 Mustard app is the light switch that allows for the light-bulb moment.”