How many minutes do a player have to field out when got green card in hockey?

Answer 1

In international competition, the green card carries a two-minute suspension. Those 2 minutes only begin once the player's backside hits the chair, so you'll often see them sprinting off the pitch as the game can continue without them.

It has also been adopted in many domestic competitions at elite club and representative level, but is not in the rules of the game. Previously, the green card was a "warning".