Senior QB Al Pena, who transferred from Oklahoma State, quit the team to coach high school football. He was competing with sophomore Blake Joseph and redshirt freshman Case Keenum for the UH QB job. I would guess this means Briles told Pena he was no longer in the mix for the starting job and would be a backup if he stayed with the program. thats just me speculating of course. Here is the link from the Houston Chronicle.
http://www.chron.com/disp/story.mpl/sports/5075637.html