A "Changeup" is a type of pitch in baseball designed to deceive the batter. It is thrown with the same arm motion as a fastball but at a significantly slower speed. This difference in speed can disrupt the batter's timing, making it harder for them to make solid contact with the ball. Typically, a changeup is thrown by pitchers like Max Scherzer or Clayton Kershaw as part of their pitching arsenal. It is an effective tool for keeping batters off balance and is often used in combination with faster pitches to enhance its effectiveness.