Fix up your fastball with a Gripz Jack McDowell Right-Handed Fastball Training Baseball. These unique training balls have a textured gripping surface for all 5 fingers to train proper grip with muscle memory response. Each groove has a number 1-5 to make it easy to learn and throw 2-seam and 4-seam fastballs. Created by Jack McDowell, it's simply the best way to master this fundamental pitch. The ultimate training tool for proper fastballs. GripRite grooves for perfect finger position on the ball. 2 fastball grips (2-seam and 4-seam). Created by Cy Young winner Jack McDowell. For right-handed throwers only. 2 training ball included.
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