What happens to a defender's 'active' status for offside purposes if they are injured and end up off the field?

When a defender is injured and leaves the field, they maintain their 'active' status for offside purposes until the next stoppage of play occurs. This means that even though they are off the field, they can still influence the offside situation for an attacking player attempting to play the ball. The Laws of the Game stipulate that a player is deemed to be ‘active’ until a specific stoppage, regardless of their physical location on the field. Therefore, as long as the game is still in motion and no stoppage has occurred, the defending player's status remains relevant to offside decisions until the referee halts play for any reason, such as an injury timeout or a goal.