US Patent 10561915 Pitch training device

A pitch training device used to improve the throwing technique of balls used in sports. The device includes a core and a substantially disk-shaped body that provides immediate visual feedback as to whether the device was properly thrown. The core exhibits a density greater than the density of the body, thereby mimicking the moment of inertia of many sports balls. This, in turn, allows the user of the device to improve the training techniques used to increase spin efficiency of a ball while also helping train and improve other throwing techniques.