Raiders coach Tom Cable admitted on Monday that Kyle Boller could start at quarterback on Sunday against the Broncos. Bruce Gradkowski is dealing with a shoulder injury and Jason Campbell has a sprained left knee. Boller said he feels he would be ready to go even though he has gotten almost no practice time with the first-string offense since the start of the season. "I've pretty much stayed on top of it over the last six weeks and that's part of your job," Boller said. "Doesn't matter if you're a starter, second-stringer or third-stringer. You have to always be into the game plan and doing just the same things the starter's doing so I don't think I'll miss a beat."