For the first time , two NFL teams will face - off in a major sports matchup this season . Mike and John Harbaugh have played down the possibility of any rivalry . Brother - versus - brother is a common reference from the Bible to network TV .
For the first time , two sibling coaches will face-off in a major sports matchup this Sunday . Jim and John Harbaugh have played down the notion of any rivalry . Brother-versus-brother is a common theme from the Bible to network TV .