professional sports. bob costas, what do you make of these changes and how might it impact the game going forward? >> leaving pete carroll aside for a moment, no disrespect intended. there is a certain symmetry here with saban and belichick on the same day because each is inarguably the greatest of his era in their respective categories. there's no disputing that belichick is the greatest, at the very least greatest nfl coach of the last couple of decades and you can make a very strong case for him as the best all time. the same is true about nick saban in the college ranks. if we're talking about all time, then there's bear bryant and woody hayes and joe paterno, and you can make as good a case for them against saban. saban, without question, the best of his time and maybe the best of all