defensive back
US /dɪˈfensɪv bæk/
UK /dɪˈfensɪv bæk/

1.
defensive back, zagueiro
a player in American or Canadian football whose main role is to prevent the opposing team from completing passes or making long runs
:
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The defensive back intercepted the pass, turning the tide of the game.
O defensive back interceptou o passe, mudando o rumo do jogo.
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Good coverage by the defensive backs is crucial for a strong defense.
Uma boa cobertura pelos defensive backs é crucial para uma defesa forte.