I was able to find a single post, after a few hours of searching, that mentioned a way to at least prevent the freezing from occuring. Only problem is, you have to do it after every game you play. It’s a little annoying that EA hasn’t had this problem patched yet, but this is better than nothing.

All you have to do to prevent the freeze, is after every game you play, save your superstar, then exit career mode. Then, if you want to play another game, resume your career. It’s worked for me every time and it really doesn’t take that long to do.

I’m not sure, but this problem might also occur in Franchise mode or other modes in the game. If so, try saving your game, exiting the mode, and then load your save, after each game.