Over time he's gotten afraid to make a mistake....When he makes one he's usually done.
I have stated this before, but makes me wonder if hc is turning all our qb to play in fear of making a mistake. If so that takes all of aggressive play from the qb, which will ruin him. I mean actually that is what hc is teaching the backups. You make one mistake and you are out, that's why it is so puzzeling why he sticks with jg with mistake after mistake after mistake.