Harrie Holland Dadmun was a professional football

American football

American football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football. The ball can be advanced by...

 player who spent two years of the American Professional Football Association, the forerunner to the National Football League

National Football League

The National Football League is the highest level of professional American football in the United States, and is considered the top professional American football league in the world. It was formed by eleven teams in 1920 as the American Professional Football Association, with the league changing...

, with the Canton Bulldogs

Canton Bulldogs

The Canton Bulldogs were a professional American football team, based in Canton, Ohio. They played in the Ohio League from 1903 to 1906 and 1911 to 1919, and its successor, the National Football League, from 1920 to 1923 and again from 1925 to 1926. The Bulldogs would go on to win the 1917, 1918...

 and the New York Brickley Giants. There is no relation between the Brickley Giants and the modern New York Giants

New York Giants

The New York Giants are a professional American football team based in East Rutherford, New Jersey, representing the New York City metropolitan area. The Giants are currently members of the Eastern Division of the National Football Conference in the National Football League...

 franchise.

Dadmun played college football

College football

College football refers to American football played by teams of student athletes fielded by American universities, colleges, and military academies, or Canadian football played by teams of student athletes fielded by Canadian universities...

 at Harvard University

Harvard University

Harvard University is a private Ivy League university located in Cambridge, Massachusetts, United States, established in 1636 by the Massachusetts legislature. Harvard is the oldest institution of higher learning in the United States and the first corporation chartered in the country...

 and Tufts

Tufts University

Tufts University is a private research university located in Medford/Somerville, near Boston, Massachusetts. It is organized into ten schools, including two undergraduate programs and eight graduate divisions, on four campuses in Massachusetts and on the eastern border of France...

. In 1916 he was elected the captain of Harvard squad.