Chain crew

In gridiron football, the chain crew (commonly known as the "chain gang") are three people, each of whom holds vertically a signal on a pole on one of the sidelines. The chain crew, under the direction of the linesman, signals the officials' decisions; it does not make decisions. Players look to the chain crew to see the down number and the line to gain. Officials may rely on the chain crew after a play (incomplete pass or penalty) whose outcome depends on the original spot of the ball.

Chain crew

In gridiron football, the chain crew (commonly known as the "chain gang") are three people, each of whom holds vertically a signal on a pole on one of the sidelines. The chain crew, under the direction of the linesman, signals the officials' decisions; it does not make decisions. Players look to the chain crew to see the down number and the line to gain. Officials may rely on the chain crew after a play (incomplete pass or penalty) whose outcome depends on the original spot of the ball.