In PlayerPlus there is a possibility to copy a player to another team. To do this, the person who wants to copy the player must be a member of both teams and have an administrative role, such as coach. In the permissions table the item "Manage members" must be selected.
If you have this permission, you can go to the player's profile and click on "Edit" in the upper right area. Scroll down and you will find the button "Copy player profile". One click later you can select the appropriate team to copy the player to.