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Boxing Biography

Jack Dempsey

“Manassa Mauler”

American · Manassa, USA · Born 24 June 1895

Heavyweight
66-13-6
record
3
world title reigns
51
k o wins
7
reign years

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Ferocious American heavyweight champion of the 1920s whose savage punching power, relentless aggression and defining matches with Gene Tunney made him one of the most charismatic figures in sports history.

Jack Dempsey was the ferocious 'Manassa Mauler' who dominated boxing in the 1920s as heavyweight champion, known for his aggressive, relentless style and the devastating power of his punches. His fights drew the first million-dollar gates in boxing history and made him one of the biggest sports stars in America. Despite losing his title to Gene Tunney in two famous bouts, Dempsey's legacy as one of boxing's all-time greats is undimmed.

Famous For

Aggressive fighting style and knockout power as heavyweight champion

Playing Style

How They Played

Aggressive swarmer with devastating left hook and relentless pressure

Legacy

Lasting Impact

One of boxing's first major celebrities who helped popularize the sport in the 1920s

Career Journey

Timeline

1914 📌 Professional boxing debut
1919 🏆 Won World Heavyweight Championship vs Jess Willard
1921 🎯 Defeated Georges Carpentier in first million-dollar gate
1926 🎯 Lost heavyweight title to Gene Tunney
1927 🎯 Long Count Fight rematch with Tunney
1940 📌 Final professional fight
Career Timeline — Jack Dempsey
1914
Professional boxing debut
1919
Won World Heavyweight Championship vs Jess Willard
1921
Defeated Georges Carpentier in first million-dollar gate
1926
Lost heavyweight title to Gene Tunney
1927
Long Count Fight rematch with Tunney
1940
Final professional fight