Where does this come from, and can I check it?

The first convention of baseball clubs fixed the length and other rules. The figure is taken from National Baseball Hall of Fame, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a sports fact?

Yes. It sits on the Sports shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Baseball settled on nine innings in 1857

The first convention of baseball clubs fixed the length and other rules Early games ended when a team reached 21 runs, which could take a long time. The 1857 convention set nine innings and a diamond with bases 90 feet apart. The distance between bases has stayed the same ever since, which is why the shape of the infield looks so familiar. It sits in Mondo's sports collection, one of 200 facts that each trace back to the reference below.

Where this comes from

National Baseball Hall of Fame

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

Go further

History trivia

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Tags: baseball, rules, 1857

Baseball settled on nine innings in 1857: the short answers

Where does this come from, and can I check it?: The first convention of baseball clubs fixed the length and other rules. The figure is taken from National Baseball Hall of Fame, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a sports fact?: Yes. It sits on the Sports shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.