Yes I have experienced the same thing just last night. I control 7 teams in my offline CFM and the game freezes up on just one of those teams. I too thought I had lost everything since I too had to replay the Cam Newton scenario again.
I went back in and it froze up again so I chose another one of my CFM teams and I was able to play with them. Tonight I will try again with the CFM team that froze up on me twice last night. This time I hope it works and does not freeze again.