American football positions four linebackers, and four defensive backs (two cornerbacks, a strong safety, and a free safety) Special teams are units that are on the field during kicking plays. While many players who appear on offensive or defensive squads also play similar roles on special teams (offensive linemen to block, or defensive players to tackle) there are some specialist roles which are unique to the kicking game. 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
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,