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

His reign as heavyweight champion lasted nearly twelve years. The figure is taken from International Boxing 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

Joe Louis defended the title 25 times

His reign as heavyweight champion lasted nearly twelve years Louis won the title from James Braddock in 1937 and held it until he retired in 1949, making 25 successful defences. The streak included a rematch win over Max Schmeling in 1938 that carried enormous symbolic weight in the United States. The record for consecutive title defences still stands in the heavyweight division. It sits in Mondo's sports collection, one of 200 facts that each trace back to the reference below.

Where this comes from

International Boxing 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.

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American History trivia

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Cassius Clay shocked Sonny Liston in 1964The 22-year-old challenger won the heavyweight title when Liston quit on his stool Floyd Mayweather retired with a 50-0 recordHe beat Conor McGregor in 2017 to pass Rocky Marciano's 49-0 Women boxed at the Olympics from 2012London added three women's weight classes to a men's programme of ten Olympic men boxed without headguards in 2016The equipment was dropped for men after research found it did not protect against concussion The Queensberry Rules made boxers wear glovesPublished in 1865, they replaced bare-knuckle prizefighting with rounds and counts Boxing title fights were cut to 12 roundsThe WBC made the change in 1983 and the other bodies followed in 1987

Tags: boxing, heavyweight, record

Joe Louis defended the title 25 times: the short answers

Where does this come from, and can I check it?: His reign as heavyweight champion lasted nearly twelve years. The figure is taken from International Boxing 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.