Knuckle changeup
Encyclopedia
A knuckle changeup is a type of baseball pitch that includes combining the knuckleball
Knuckleball
A knuckleball is a baseball pitch with an erratic, unpredictable motion. The pitch is thrown so as to minimize the spin of the ball in flight. This causes vortices over the stitched seams of the baseball during its trajectory, which in turn can cause the pitch to change direction—and even...

 and the changeup
Changeup
A changeup is a type of pitch in baseball. Other names include change-of-pace, Bugs Bunny change-up, the dreaded equalizer, and simply change. The changeup is sometimes called an off-speed pitch, although that term can also be used simply to mean any pitch that is slower than a fastball...

. The pitch is thrown with a circle change up grip with 1-3 fingers raised. More movement, more fingers raised. Thrown with a stiff wrist
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