NHL 16 Be a pro mode

You are able to do this in a few ways (Or should be). Before choosing Be a Pro mode, you are able to edit player information and abilities, as well as team rosters. You can then save your preferences to act as your default roster (Past EA updated rosters always available), and you should be able to use your new number. Note* This will not change anything in a save slot you have already created, this method must be done in advance, and must be saved over. Hope that helps!