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Leen Jansen

Full name: Leonardus Eustachius "Leen" Jansen
Gender: Male
Born: August 3, 1930 in Rotterdam, Zuid-Holland, Netherlands
Died: January 27, 2014 in Bergen op Zoom, Noord-Brabant, Netherlands
Affiliations: Huizenaar, Rotterdam (NED)
Country: NED Netherlands
Sport: Boxing


Leen Jansen was discovered as a boxer by soldiers who invited the harbor worker to join them for a few fights. Winning 109 out of his 134 amateur fights, Jansen qualified for the 1952 Olympics. In the quarter-finals, he was knocked out by eventual winner and future heavyweight world champion [Floyd Patterson]. Jansen immediately turned professional, eventually fighting 71 bouts through 1967, winning 60. He rarely fought outside of the Netherlands. Three times he successfully contested the Dutch middleweight title in 1954 and 1955. He also twice won the Dutch light-heavyweight title (1958-59), but failed to win the heavyweight title on two attempts. In 1980, he started a boxing school in St. Maartensdijk, where he continued to teach until shortly before his death at 83.


Games Age City Sport Event Team NOC Rank Medal
1952 Summer 21 Helsinki Boxing Men's Middleweight Netherlands NED 5T

Men's Middleweight

Games Age City Sport Team NOC Phase Unit Rank Date Result MR R
1952 Summer 21 Helsinki Boxing Netherlands NED Quarter-Finals Match #2 2 1952-07-31 Patterson (USA) , Jansen (NED)
1952 Summer 21 Helsinki Boxing Netherlands NED Round Two Match #2 1 Jansen (NED) , Malouf (CAN) referee stops contest 1
1952 Summer 21 Helsinki Boxing Netherlands NED Round One Match #4 1 1952-07-29 Jansen (NED) bye
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