I have no idea how reliable @zachTNT is on twitter. But apparently he has reached out to ESPN each of the past few weeks regarding whether Gruden was on-site for MNF. He said ESPN usually responds within an hour of his inquiry and responds specifically that Gruden is on-site doing pre-production, etc. This week, however, ESPN did not respond for like 8-12 hours and their response did not reference Gruden specifically but instead said generally, based on schedule, our crew arrived in Baltimore yesterday...