You dont HAVE to. I use the dolphins on all-madden. What I do is resign my bad players who demand a lot of money (Starks, J. Allen, etc...) to a 1 year contract. I dont resign them in the off season, just let them go. Since the dolphins have good cap room it's easy to do this with almost all the bad players who make too much money. The next year I draft some good players and sign some cheap young free agents. I havn't lost a superbowl yet and I've simmed ahead a few times and never have any cap issues.