I rewatched the play in full speed a bunch of times, and only from the TV angle. I am not an football genious but to me it seems like Mayo is the one that blew the coverage. I could be 100% wrong but that is what it looked like to me. Vrabel was lined up across from Keller and came on a blitz. Mayo dropped back in coverage from his LB position, but seemed like he dropped back too far leaving Keller wide open. I am not a football genious, it is just what I saw from watching the game full speed, but rewinding. If anyone else has an opinion please feel free to correct me. Maybe a real football analyst already went over the play and knows exactly what went wrong.