Sorry to hear Cassel has mounting frustration.

If he's too small and keeps slipping out, he should give up on doggie and tell her to lie on her back with her ankles up over her head, so he can... oh, wait. This thread title was misleading. Never mind.

Im sure Brady would be getting pissed off too if he was behind this line

I'm not surprised he's getting frustrated, but he's had opportunities to hit open guys down the field for big plays this season and he's missed. You only get a few of those a game, and he's missed more than he should have.