I voted Shrout based on who they trotted out given the chance before.  I also think Shrout throws into coverage every chance he gets.  So that sucks.
I don't know what the deal is with Mauer, but he must have something going on (physically or mentally: he faced some personal challenges in the off-season) or I would think he would the nod.  Kid is a baller and he is not scared.
But I thunk they will get HB some work after a few series.  I think its cruel to throw him to the wolves against Bama.  Might need a couple weeks and the bye to get fully ready.  Imo, Let him settle down a bit watching, then hand him the keys.  Just protect him and accept the lumps he may take.  surely CJC can scheme up a gp for this kid.