Amos Alonzo Stagg (August 16, 1862 – March 17, 1965) was an American collegiate coach in multiple sports, primarily football, and an overall athletic pioneer. He was born in West Orange, New Jersey, and attended Phillips Exeter Academy. Playing at Yale, where he was a divinity student, and a member of the Psi Upsilon fraternity and the secret Skull and Bones society, he was an end on the first All-America team, selected in 1889.
Stagg became the first paid football coach at Williston Seminary, a secondary school, in 1890 and 1891. This was also Stagg's first time receiving pay to coach football. He would coach there one day a week while also coaching full time at Springfield College. He moved on to coach at the University of Chicago (1892-1932), and the College of the Pacific (1932-46), after he was forced to retire from Chicago at the age of 70. During his career, he developed numerous basic tactics for the game (including the man in motion and the lateral pass), as well as some equipment. From 1947 to 1952 he served as a co-head coach with his son at Susquehanna University in Pennsylvania. In 1924, he served as a coach with the U.S. Olympic Track and Field team in Paris.
He was elected to the College Football Hall of Fame as both a player and a coach in the charter class of 1951 and was the only individual honored in both areas until the 1990s. Influential in other sports, he developed basketball as a five-player sport and was elected to the Basketball Hall of Fame in its first group of inductees in 1959. A pitcher on his college baseball team, he declined an opportunity to play professional baseball but nonetheless impacted the game through his invention of the batting cage.
On March 11, 1892, Stagg, still an instructor at the YMCA School, played in the first public game of basketball at the Springfield (Mass.) YMCA. A crowd of 200 watched as the student team crushed the faculty, 5-1. Stagg scored the only basket for the losing side.
Known as the "grand old man" of college football, Stagg died in Stockton, California, at 102 years old.