Conditionally on Les Miles staying at LSU, which I would say that his seat is at least starting to get warm down in Baton Rouge based on his bone headed decisions. If LSU replaces Miles with a NFL guy, that coach may prefer a more pro-style QB than Shepherd. Anyway, I think LSU will probably find someone better than Garrett between now and the time he graduates and whoever that is will beat Garrett out.
And on top of that, I believe that both Garrett and Favre start at QB ONE year max because of the QB situations at both schools, barring injuries. I also think Favre will be our holder on kicks as well, and thus more playing time than Garrett, hence why I am selling.