Circle change
The circle change is a type of changeup.
It gets its name from the grip, where the thumb and index finger form a circle.
Because this shape resembles the “OK” hand sign, it is sometimes also called the “OK ball.”
Like a standard changeup, the circle change is thrown with fastball arm speed while reducing velocity to disrupt the hitter’s timing.
Compared to a basic changeup, it tends to have slightly more arm-side fade and downward movement.
Grip and Release
Form a circle with your thumb and index finger and use it to support the side of the ball.
Do not apply pressure with your fingertips.
Instead, stabilize the ball using the base of your fingers (the upper part of the palm), especially the base of the little finger.
At release, the ball should come off your hand with a rolling sensation from the middle finger toward the outside—moving from the middle finger to the ring finger, then to the little finger.
As with any changeup, it is critical to maintain fastball arm speed.
Be careful not to slow down your arm when trying to throw the pitch more softly, as this will make it easier for hitters to recognize.
The circle change is most effective when it closely mimics a fastball in arm speed and release while delivering a significant change in pace and movement.