Answer
The 12–6 curveball is a type of curveball that is thrown with a 12-to-6 arm angle. This means that the pitcher's arm is at a 12 o'clock position when the ball is released, and it travels down to a 6 o'clock position when it reaches the plate. The 12–6 curveball is known for its sharp break, which makes it difficult for batters to hit.