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backfield
backfield n.
Brit. 
/ˈbakfiːld/
, /ˈbakfiːld/U.S. /ˈbækˌfild/
in Baseball, the outfield (rare or nonce-use); in American football, the (positions occupied by) players behind the line of scrimmage./ˈbækˌfild/ΘΚΠ
society > leisure > sport > types of sport or game > ball game > baseball > baseball ground > [noun] > outfield
centre field1835
left field1857
left1867
garden1868
backfield1911
outside1913
society > leisure > sport > types of sport or game > ball game > football > American football > [noun] > types of player > specific group of players
defensive line1632
rush1881
rush line1882
offensive line1893
strong side1905
backfield1911
platoon1941
secondary1955
suicide squad1960
D-line1971
1911 Collier's 12 Aug. 21/2 From the home plate to the back field was a marked physical retrogression, ending in three strident but barely perceptible fielders.
1923 Outing Mar. 287/1 Now look at the backfield, the terror of all elevens.
1944 N. Mailer in E. Seaver Cross-section 346 They had this play built around me, where I shift into the backfield..making me eligible to hold the ball.
1970 Globe & Mail (Toronto) 28 Sept. 23/6 Halfback Bill Simpson, playing his first game in London's offensive backfield after being shifted from defense.
1983 Washington Post 10 Nov. e8 Maryland's football team practiced for the third straight day yesterday without its starting backfield.
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