A lot has been said here about KJS's past and lack of maturity. Perhaps that is part of the reason he wanted KJJ to play for Nebraska, and more importantly Riley. Through all the teams, players, and coaches over his career, something about KJS's time with Riley stuck with him all these years. Perhaps KJJ's problems have existed for quite some time, and KJS felt with his own past maturity problems, Riley could be the influence KJJ needed.
If KJJ gets his act straightened out, he'll be back. Riley has said the door is open, and clearly KJS would like to see him here. Seems it's all up to KJJ now. Hope he makes it.