What does knuckleball mean?
A knuckleball is a baseball pitch thrown by gripping the ball with the knuckles instead of spinning it with the fingertips. Because the pitch has little or no conventional spin, it can move slowly, wobble, or appear to change direction, making it difficult for batters to judge and hit. The term is used especially in American baseball, where a knuckleball is associated with an unpredictable, finesse-based style of pitching. Its effectiveness depends largely on the pitcher's grip, touch, and command rather than on high velocity. The word can also be used informally to describe a particularly deceptive fastball. For readers interested in baseball terminology, knuckleball is a distinctive example of how a small change in how the ball is held can fundamentally alter its movement on the field.
nounA baseball pitch in which the ball is gripped with the knuckles rather than the fingertips, causing it to travel with relatively little spin. The pitch may move slowly and change direction unpredictably.
- A baseball pitch thrown with the knuckles, designed to travel with minimal spin and an unpredictable movement.
"The pitcher relied on a knuckleball to keep the hitters from getting a clean hit."
"He mastered the knuckleball and used it to neutralize powerful hitters."
"The batter waited too long for the pitcher's knuckleball and never caught up with it."
The plural is used for individual pitches of this kind.
"He mixed fastballs with knuckleballs to keep the hitters guessing."
The knuckleball turns baseball's most dramatic movement into a matter of touch: the pitcher grips the ball without letting it spin.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of knuckleball
The word is a compound of “knuckle” and “ball,” referring to the way the ball is held. It developed in the vocabulary of American baseball in the early twentieth century, when pitchers sought grips that reduced spin and produced deceptive movement. The related form “knuckleballer” refers to a pitcher who specializes in the pitch.
Related word forms
How knuckleball is actually used
The term is chiefly associated with baseball in the United States. It is also used figuratively, usually humorously, for a fastball that a batter finds difficult to hit cleanly.
Easily confused with knuckleball
A curveball is thrown with spin that makes the ball curve through the air, whereas a knuckleball is primarily controlled by gripping the ball with the knuckles and is not necessarily spinning.