Who flipped the K?Sourced
A backward K means a called strikeout.
Even the Hall of Fame cannot name its inventor.
Baseball writer Henry Chadwick used K for strikeouts in 1859. But a National Baseball Hall of Fame reference librarian said no single person is known to have first used the backward K for a strikeout looking.
A familiar mark
can have an unknown origin.
Summary / translation: Unbubly · CC BY-SA 4.0
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Strikeout looking · Wikimedia contributors
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Reviewed: 2026-10-01