Joseph Duff was an All-American football player and coach who was killed in action during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. Duff graduated from Shady Side Academy

Shady Side Academy

Shady Side Academy is a private, secular coeducational PK-12 preparatory school located on three campuses in Pittsburgh, Pennsylvania, United States, established in 1883.- Campuses :Shady Side Academy has three campuses in Pittsburgh....

 in Pittsburgh, Pennsylvania before enrolling at Princeton University. He played guard for Princeton and was selected for Walter Camp

Walter Camp

Walter Chauncey Camp was an American football player, coach, and sports writer known as the "Father of American Football". With John Heisman, Amos Alonzo Stagg, Pop Warner, Fielding H. Yost, and George Halas, Camp was one of the most accomplished persons in the early history of American football...

's All-American eleven in 1911. After graduating from Princeton, Duff became the school's football coach for the 1912 football season. He served as the football coach at the University of Pittsburgh

University of Pittsburgh

The University of Pittsburgh, commonly referred to as Pitt, is a state-related research university located in Pittsburgh, Pennsylvania, United States. Founded as Pittsburgh Academy in 1787 on what was then the American frontier, Pitt is one of the oldest continuously chartered institutions of...

 in 1913 and 1914. He served in the U.S. military in World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. He went to France as a private in a machine gun unit and was promoted to the rank of a lieutenant. He was killed in action in France on October 10, 1918.