To add players to the new team, go to teams via setup and click the squad button for that team. 

The page that is displayed will show that there are no records found since this is a new team. To add players to the squad, choose the ‘Add Club Members to Squad’ button as in the example below.

The next page allows you to search for players without a squad role for the new team. Search by name or select ‘Display All Members’ without this role.

Use the check box to the right of the player’s name to select the player and then click Save.

Save the selections a page at a time.

To remove a player from the squad but leave them on your member database, select the player and click the Remove Role button for that player.