They've already done enough to lose this game and their offense isn't capable of winning it. Lovie has to do whatever he can do give his team a chance to win. If he goes back out there with the same QB, he simply isn't doing that. But he's giving the team a chance to win longterm. With this offense, the Bears are gonna have a tough shot winning it anyway. So, Grossman won't make much of a difference, unless you believe he's THAT much better than Orton....which is hard to believe he is at this moment without having played much football in 2 years. What happens if Grossman comes into this game that is looking like a loss anyway and goes down with another injury? I would guess the odds of injury increase simply due to the fact the offense is gonna put the ball in the air more than they have all year. Grossman theoretically allows the offense to do a lot more than Orton does. The Steelers' defense is having an easy time predicting what's coming. The offensive line, though, is giving Orton all the time in the world right now. I don't think Grossman would have to press or face much of an injury risk. The defense has to stop 'em here for that to even matter, of course.