ESPN isn't run by some passionate fan base. They are highly successful people who will protect their brand at the expense of any employee. There is no way Gruden just doesn't call the game tonight, and they make some stupid excuse. The reason I say that is the only other option is them saying Gruden took the Tennessee job, and you will know this by Friday. Neither are logical.
Dilfer isn't stepping in for Gruden tonight. He may eventually, but not tonight. If he is, it is because there is an announcement from Tennessee that Gruden is coming, and that also will not be coming down the tubes today.
Cowherd's comments have been exponentially blown out of context.