I have to think few players will have a hotter seat than Tony Romo.
There are huge expectations for the Cowboys going into this season. The regular season is a no-win situation for him. If they repeat (or come close to) their reg. season success, he will get little credit because they have shown the ability to do so and are expected to do so again. If they falter (don't make playoffs or limp in again) he as the QB/face of the franchise will take a huge hit. If they don't win at least one playoff game....forget about it. He will have to hold the door open for Wade to leave town and then find a rock to spend the off-season.
When you get as much publicity as he gets, have a budding reputation as a choker, and an expectation to lead your team to the SB, I think that qualifies as a mighty hot seat.