Like other curveball grips, the variable this time is your index finger. Grip the ball with your middle finger along the bottom seam, and your thumb along the back seam. Hold the baseball such that the curves of the seams are close to your palm, with one on top and one on bottom. Bend your index finger inward before laying it on the ball, such that your nail and top knuckle are resting on the ball, and your middle knuckle is pointing at the target.
/d/d7/Throw a Curveball Step 11 Version 2.360p.mp4For right-handed people, place your middle finger on the right seam on top, and your thumb on the left seam on bottom. Lefties should do the opposite sides. Getting comfortable with a knuckle...