Obviously, the Broncos are going to be better with Orton starting the game if he is mobile. McDaniels can put Orton into the Shotgun more than usual, but Orton still has to have some mobility to play effectively against the Chargers.
Simms did not look good against the Redskins, but all the additional practice he has had this week should help him to improve. Simms was playing well in preseason, and Simms led the Bucs into the playoffs in 2002.
If Simms cannot complete more passes then the Broncos have to bring in Brandstater.
The only way the Broncos win this game is if LT is held below 100 yards, and the pass rush improves. Rivers cannot be allowed to just sit back in the pocket and pick the secondary apart.