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A running back is a position in American and Canadian football, typically lined up in the offensive backfield. The primary role of a running back is to carry the ball on running plays, using speed, agility, and strength to evade defenders and gain yards. Running backs also contribute to the passing game by catching passes out of the backfield and blocking for the quarterback. They are often considered the workhorses of the offense, responsible for moving the ball down the field and scoring touchdowns.