This day in baseball: Initial pitcher’s mound height set

On March 1, 1903, the rules committee set the height of the pitcher’s mound to a maximum of fifteen inches — prior to this, mound heights were not regulated. The maximum elevation would drop to ten inches in 1969 due to the previous season’s dominating pitching, which saw batting averages plummet to all-time lows.

Pitcher's mound dimensions -

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