We've already told you about our AutoSchedule Module that lets you easily and quickly replay an entire season. During your replay you can have all roster changes made automatically just when they were made in real life. You won't find this feature in any sports simulation. Again, you don't have to do anything to use this feature. All roster transactions are already programmed in.
Injuries are a way of life in professional sports.
Teams win and lose championships because of them. You want the most accurate replays possible. You want teams and players to perform realistically. But, you can create brand new leagues and teams. In fact, you can set up your own league any way you want.