It's a shame that EA have now seemingly added the 'PS3 system crash' functionality to the game now as well. Seems like nearly everytime I quit the game now, the PS3 crashes completely and I get a warning message about data being potentially corrupted. On reading the official forums, this also happened on Madden '12 so I don't think this is going to get fixed any time soon.
The more time I spend with the game, the more I'm beginning to think it's complete garbage.
to get around this log out of PSN before you switch off PS3, supposed to stop the data corruption issue
Go to Account manager press triangle and sign out, then turn off PS3