If a player is not involved in at least 10% of
competitive club matches in a season (friendlies and custom cup matches excluded), there should be a good (50-75%) chance the player will leave the team (on a free transfer), but at no cost to the club. This is how it happens in the rw btw
This should not apply to
most youth (U20) players...only those with NT caps, which will put them on the market from Free Player