Baseball - The Curveball

"Balls curve as a consequence of asymmetries in the resistance of the air through which they pass." Which way it will curve all depends on this. If the resistance is stronger on one side, it will curve in the opposite direction. Because of a pitcher's release point, the way the ball curves all depends on one thing: which hand they are throwing the ball with. A right-handed pitcher throws the ball with more resistance coming from the third-base side and therefore would curve towards the first-base side. For a left-handed pitcher, it does the complete opposite. What is interesting about a curveball is that when the ball is thrown, from its initial point to its end point, the radius of the curve is almost always constant, making it actually curve perfectly (geometrically).