This game should be a win, on paper, but these matchups always scare me to death knowing how the Steelers allow bad teams to stick around. The Chargers are a bottom feeder in the NFL this year, there's no reason we shouldn't win this game.
That being said I won't be shocked if it's closer than it should be. If Ben does come back he's going to be rusty for the first quarter or so more than likely.
I'll stick with us winning though, perhaps pulling away in the 2nd half.