knuckleball

noun

knuck·​le·​ball ˈnə-kəl-ˌbȯl How to pronounce knuckleball (audio)
: a slow baseball pitch that moves erratically and unpredictably and that is thrown with little spin by gripping the ball with the knuckles or the tips of the fingers pressed against the top
knuckleballer noun

Examples of knuckleball in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Waldron developed a knuckleball, no small feat. Tom Krasovic, San Diego Union-Tribune, 5 Apr. 2026 Timing is important for Balanag’s knuckleball, more so than for other pitches. Steve Reaven, Chicago Tribune, 26 Mar. 2026 Wood was thrust into the starting role in 1971 and did his best to perfect the knuckleball to put less stress on his throwing arm. Ryan Gaydos, FOXNews.com, 19 Jan. 2026 Then, Fletcher tried something rogue, becoming a knuckleball pitcher in the Braves' minor-league organization early in the season last year. Jackson Roberts, MSNBC Newsweek, 11 Nov. 2025 See All Example Sentences for knuckleball

Word History

First Known Use

1907, in the meaning defined above

Time Traveler
The first known use of knuckleball was in 1907

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Cite this Entry

“Knuckleball.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knuckleball. Accessed 12 Apr. 2026.

Kids Definition

knuckleball

noun
knuck·​le·​ball ˈnək-əl-ˌbȯl How to pronounce knuckleball (audio)
: a baseball pitch gripped with the knuckles or fingertips and thrown with very little spin

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