Pitch Grips: Cut Fastballs
Cut-fastballs move opposite of two-seam fastballs, to the glove side of the pitcher. The amount of movement can vary with some cutters moving more horizontally and others both horizontally and downwards.
The cut-fastball grip is similar to a four-seam fastball grip, with the fingers closer together or touching. The movement comes from a difference in wrist or hand action.
Instead of trying to throw straight through the ball, try and throw through the side of the baseball, creating a cut. This means that the ball doesn’t spin straight backwards like a four-seam fastball; rather, it spins backwards with some side spin.