In field hockey, a green card is a disciplinary card that is shown by the umpire to a player as a warning for minor offenses or consistently breaking the rules of the game. It is a temporary suspension where the player must leave the field for a short period of time before they can return. Some common offenses that can lead to a green card include obstruction, stick interference, or unsporting behavior. When a player is shown a green card, they must leave the field for a minimum of two minutes. If a player receives a second green card in a game, it is upgraded to a yellow card, resulting in a longer suspension period. When a player is shown a green card, their team must continue playing with one less player until the player is allowed to return to the field. A green card can be given to a specific player or to the captain as a warning to the entire team. However, a green card cannot be upgraded to a red card.