running back
US /ˈrʌn.ɪŋ ˌbæk/
UK /ˈrʌn.ɪŋ ˌbæk/

1.
running back
an offensive player in American football who specializes in carrying the ball
:
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The running back broke through the defense for a touchdown.
O running back rompeu a defesa para um touchdown.
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He was drafted as a first-round running back.
Ele foi selecionado como running back na primeira rodada.