McFadden will be the backup to Michael Bush if he is able to play. McFadden has practiced this week but said he isn't yet 100 percent. Cable said he will not use McFadden if he's not fully healed.
"I just think that if they're tentative, they can't cut it loose," Cable said. "And if you can't cut it loose, you're not going to run hard or at the best of your ability. And if you do try to, you'll probably pull it again."
McFadden also missed a couple of weeks in training camp with a left hamstring injury and doesn't want to rush back too soon out of fear of making this injury even worse.
"You just try to tell yourself you just want to go out and try to coast, don't hit a burst until you feel like you can all the way," he said.
McFadden got off to a fast start this season, rushing for 345 yards in the first three games as he finally started to show signs of why he was drafted fourth overall in 2008. He has 454 yards from scrimmage in his first four games and scored two touchdowns.
Bush, who missed the first two games with a broken left thumb, has picked up where McFadden left off. He had a strong fourth quarter after McFadden's injury two weeks ago against Houston, then rushed for 104 yards and the go-ahead touchdown in the fourth quarter against San Diego.
The Raiders are looking forward to having both backs healthy in the same game. That could create matchup problems when Oakland uses both on the field at the same time.
"We're going to play to their strengths," offensive coordinator Hue Jackson said. "The key in that situation is let them play. I think they both know and understand that whoever has the hot hand, they're going to get the ball. That's just the bottom line. There's no egos there, which is fun for me."
Oakland has endured a run of hamstring injuries this season, but Gallery's was one of the more severe as his popped while he was chasing after an interception against the Titans.
"Until this week, I wasn't able to drive out of a stance," he said. "You can't fight through that. I just have to be comfortable with the stuff I do in practice and go in a game and do that. Obviously, it's probably not going to feel great or 100 percent -- nobody is -- but if I can go, that's what I am going to do."
Copyright 2010 by The Associated Press