Usually there have been no DNFs in my career. I have had all the top teams retire in at least one race in every season. Singapore season 1 (I saw Hamilton hit the wall), Hungary season 2 (there was a pileup of about 5 cars, a Lotus, both Virgins and both Ferraris) and in Monaco season 3, which was the only incident in my career mode that deployed a safety car, though I didn't see the accident or debris from it.
In all those races, all the McLarens, Red Bulls and Ferraris retired.