Spin Right Fastpitch Spinner Develop a pitchperfect spin with the Spin Right Fastpitch Spinner. The Spinner is a softball training aid designed to teach the pitching spins and rotation directions in fastpitch softball. Whether you are working on the basics of releasing the softball or the advanced spins of the rise, curve or drop, the Spin Right Fastpitch Spinner is an essential tool to have in your arsenal. The Spinner is used at many of the top collegiate softball programs throughout the country. The Spin Right Fastpitch Spinner was invented by softball halloffamer Cheri Kempf at the nationally renowned softball camp Club K. It is endorsed by pitching experts Ernie Parker and Mona Stevens. Originally designed for pitchers, many coaches use it to teach proper fundamentals of overhand throwing as well. Colors: Pink,Yellow.