Automatically adding names to list

I run a football pickem contest and have been working on collecting some historical data. I have a sheet in the workbook called "Year Sort" that has each year of the game in separate columns across the sheet. I then have a page called Players-annual scores where I have an alphabetical list of all players. We have new players every year, and what I'm trying to do is get Excel to recognize a name that is NOT on the Annual Scores list and automatically insert that name into the list. It would be nice if it would sort alphabetically as well but that's not a must have. I'm attaching some pictures of what I am using to make it easier to understand. Thanks for any help anybody can provide