Throw a cut fastball—a pitch between a fastball and a slider—by getting a proper grip on the baseball, and then adjusting the placement of your fingers and the position of your wrist accordingly. A cut fastball moves similar to a tight slider.Continue Reading
Place your index and middle fingers along the narrow seams of the ball.
The middle finger can either be place along the seam, or the seam can be running in between both fingers. Your fingers should be relatively close to each other.
Move your thumb to where it is diametrically opposed to your other two fingers at the top of the ball.
If you are throwing right handed, turn your wrist to the left. If you are throwing left handed, turn your wrist to the right.
When throwing a cut fastball, put extra pressure on your middle finger. This will help the ball cut by creating a natural spin.