EVERY single time they run the pistol, Cinci has someone in the backfield. It's a gimmicky offenses that even colleges barely run. It's not going to work with Manziel. What would work is getting the running game going and using it to set up playaction where Manziel is able to role out of the pocket, kinda like he was doing with Hoyer. But leave it to Shannahan to over-think the offenses approach and fuck this whole thing up.
Manziel looks like a deer in headlights and has made numerous bonehead decisions. You figure the coaching staff would have picked up on that early and made adjustments accordingly, but nope.