If a team is ahead by 4 goals, then the other team can add one additional field player. The additional player will be taken off the field if his/her team scores. If a team is ahead 6 or more goals, then an additional player will be added. If a team is 8 or more goals ahead, then an additional player will be added. If the losing team does not have additional players, then the winning team should consider taking a player off the field.