As you progress your team through College Football 25's Dynasty mode, you will have a good number of players who join your team, but you'll need some time to develop and ensure the future of your program is safe. One of the ways that you can do this in the game is through Redshirting a player, a mechanic that exists within the real world of collegiate football. It's a way that a program can make sure they keep a player with their team while not having to worry about allocating a roster spot for them.