New Transfer Rule

Although transfers have always been a part of Arizona soccer, the fervor over them and the amount of them have increased recently. As a result, we are beginning to look at implementing new transfer rules. One idea is to set a specific date, maybe sometime in November, and say that if a player transfers after that date, the player is cup-tied to their old team and cannot play in state cup or state league with the new team they have transferred to. I would like to hear from everyone about problems they are encountering that relate to transfers and any ideas people would have for revising or totally revamping the transfer rule.