backfield

(bakfēld′)

noun

    1. the set of four offensive backs, including the quarterback and some combination of running backs and flankers
    2. the set of defensive backs, usually three, four, or five, who are primarily responsible for covering the pass receivers
  1. either of the areas where the backs are positioned

See backfield in American Heritage Dictionary 4

noun
  1. Football
    a. The players stationed behind the line of scrimmage.
    b. The positions filled by these players.
    c. The area in which these players line up.
  2. Sports The primarily defensive players on a soccer, field hockey, or Rugby team.
link/cite print suggestion box