American football positions American football positions In American football each team has 11 players on the field at one time. The specific role that a player takes on the field is called his position. Under the modern rules of American football, teams are allowed unlimited substitutions; that is, teams may change any number of players after any play. This has resulted in the development of three "platoons" of players: the offense (the team with the ball, which is trying to score), the defense (the team trying to prevent the other team from scoring, and to take the ball from them), and the special
John Field (American football) football team compiled an overall record of 23–3–3, and has been recognized as national champions in 1909. After graduating from Yale in 1911, Field was hired to stay on at Yale as the head football coach. Field coached the 1911 Yale football team to a 7–2–1 record, outscoring opponents 191 to 16. Field continued to serve the Yale football team as an assistant coach in several subsequent seasons. During the period from 1899 to 1912, Yale had 14 different head football coaches in 14 years – despite compiling a combined record of 127–11–10 in those years. During that 14-year span,