
I have also experienced this lockup when trying to add a free agent player to a roster while in a saved season. When hitting the arrow key to leave that section after making the roster addition, the game locks up and I have to manually restart my computer.
I was having no problems Exiting my games in season mode until last night. It was a game where I was controlling MIN and I was playing the LA Clippers in MIN. I did add several new custom art items (jerseys, stadiums, shoes, ball, ABC scoreboard) prior to playing this season game. Although I don't believe any of the custom art items affected either team I played. Also, I did have customart enabled before this with no problems exiting after playing a season game.
Another factor is my computer which is only 500mhz with 256mb RAM. Though, like I said, I was not having problems previously.
If any of you have any ideas or tips about this problem, please let me know. Would really appreciate it.