A curveball is a baseball pitch thrown with a specific spin that causes the ball to curve downward as it approaches the batter. The spin is created by the pitcher gripping the ball with the index and middle fingers spread apart, and then snapping the wrist downward as the ball is released. This imparts a backspin on the ball, which causes it to deviate from its original path.

As the curveball moves through the air, the backspin creates a Magnus effect, which is a force that causes the ball to curve in the opposite direction of the spin. This force is generated by the difference in air pressure between the front and back of the ball. The air pressure is lower on the back of the ball, which causes the ball to curve downward.

The speed of a curveball is typically slower than that of a fastball, but the curveball is more difficult to hit because of its unpredictable movement.

Cutter

A cutter is a baseball pitch thrown with a similar grip and release as a curveball, but with less spin. This results in a pitch that moves less than a curveball, but is still difficult to hit because it appears to be a fastball until the last moment.

The cut fastball, as it is sometimes called, is typically thrown between 85-95 miles per hour. It has a slight downward movement and a sharp break to the batter's arm side, making it difficult for hitters to make solid contact.

Sinker

A sinker is a baseball pitch thrown with a specific grip and release that causes the ball to sink or drop as it approaches the batter. The grip and release are similar to those of a fastball, but the pitcher releases the ball with a slightly downward trajectory.

The Magnus effect also contributes to the downward movement of the sinker. As the ball moves through the air, the backspin creates a lift force, which is opposed by the downward force of gravity. The combination of these two forces causes the ball to sink.

The sinker is typically thrown at a higher velocity than a curveball or cutter, but it is still a relatively slow pitch. It is often used as a strikeout pitch, as it can be difficult for hitters to adjust their swing to the ball's downward movement.

Sweeper

A sweeper is a baseball pitch thrown with a specific grip and release that causes the ball to move away from the batter as it approaches. The grip and release are similar to those of a slider, but the pitcher releases the ball with a slightly outward trajectory.

The Magnus effect also contributes to the movement of the sweeper. As the ball moves through the air, the backspin creates a lift force, which is opposed by a sideways force generated by the pitcher's release. The combination of these two forces causes the ball to sweep away from the batter.

The sweeper is typically thrown at a higher velocity than a curveball, cutter, or sinker. It is often used as a strikeout pitch, as it can be difficult for hitters to adjust their swing to the ball's movement.