Two-seam grips are used to throw fastballs. Rather than breaking down (as in a curveball), two-seam pitches break to the right or left.
Dig the fingernail on your index finger into the seam to help get a tighter spin when you throw the pitch.
Your grip should be firm, but not too tight. You want your thumb to be able to flick up behind the ball when it is released. Do not choke the ball. Make sure there is a gap between your thumb and index finger, and small space between thumb and ring finger.
Through a change-up curveball by increasing grip depth. Experiment with slight variations in grip depth and finger (thumb and middle) position. Find a grip that is comfortable and works with your throwing style.
Use this pitch to practice your curveball technique, but avoid using it in games. Experienced batters are likely to see the raised index finger and adjust their stance in anticipation of a curveball. [9] X Research source
Your index finger is not needed to throw the pitch, with the thumb and middle finger providing all the spin. [12] X Research source When throwing, your elbow should be at the same height or above your shoulder. Your hand and wrist should form a vertical line with your forearm. [13] X Research source Keep your forearm and wrist muscles loose until just prior to release. Strongly contract them and quickly snap your wrist forward and inwards, allowing the ball to spin out over the middle finger. [14] X Research source
A knucklecurve grip is on average 2. 5 mph (4 km/h) faster than a standard curveball. Over a quarter of curveballs thrown by major league pitchers in 2013 were classified as knucklecurves. [16] X Research source
Think of the knuckle of your middle finger “digging” into the top of the ball. [18] X Research source
