Sounds like the ONLY info the writer has is student enrollment data from UT.
I wouldn't be so quick to assume JJ's future direction without anyone even having caught up to him to ask.
He could re-enroll ... could shoot for the NFL ... could be taking care of an ill family member back home, or dealing with some other personal hardship. It could even be wrong, and he hasn't left at all.
JJ will let the world know, when he feels the time is right.
I am a monster fan of this young man. Either way I wish him and his nothing but the best. I'm anti all things NFL consequently I'll not watch him if he goes there and hope he stays one more year on The Hill purely to enjoy watching him play. I love watching him mug DBs and as the game progesses watch them give him space.