Cleveland Browns offensive line coach Bill Callahan hopes old age and treachery will always overcome youth and skill because his kid Brian Callahan is the offensive coordinator for the Cincinnati Bengals and their new quarterback big bad Joe Burrow.
Papa Bill is the more accomplished coach having been the head coach of the Oakland Raiders and led them to a Super Bowl appearance, though most of his experience has been as an offensive line coach. Bill was also the head coach of the Nebraska Cornhuskers, incidentally.
Son Brian was the quarterbacks coach for the Lions and Raiders and the Bengals gave him the coordinator's job last season.