Raiders quarterback Jason Campbell participated in some light drills on Monday, an indication that his injuries aren't serious. Campbell worked out for the first time since being carted off the field during a preseason loss to San Francisco on Saturday. He suffered a stinger and a wrist injury against the 49ers.

Raiders quarterback Jason Campbell injured his wrist before leaving Saturday's preseason loss to the 49ers with a stinger. Campbell was taken off the field in a cart after being hurt on a sack by Travis LaBoy in the second quarter. He hurt his right wrist on the previous series in the game. He underwent an MRI on Sunday and will be evaluated again later this week. "Usually I recover pretty fast," Campbell said. "Right now there's no timetable. The thing is just to improve and continue to keep getting better. We don't know the timetable or anything, but at the same time, I haven't really missed any time before." Oakland coach Tom Cable said that Campbell's wrist is the more immediate concern.

Raiders running back Michael Bush will undergo surgery on his broken left thumb Monday and could be back in time for the season opener. Bush broke the thumb when he was hit on the hand by a helmet on his final carry Saturday night against San Francisco. Oakland coach Tom Cable said Sunday there was a "good chance" Bush would be ready to play Sept. 12 in Tennessee and that he would likely not need a cast on the finger.

Raiders running back Michael Bush fractured his thumb in the team's preseason game against the 49ers on Saturday night. Bush is scheduled to see a hand specialist on Sunday. Oakland coach Tom Cable said after the game that he didn't know how long Bush would be out.

Oakland Raiders quarterback Jason Campbell has left an exhibition game after being injured on a sack, according to an Associated Press report. Campbell landed hard on his right shoulder after being sacked by San Francisco linebacker Travis LaBoy on Saturday night. He was diagnosed with a stinger. Campbell was down on the ground for about five minutes before being carted off the field.

Running back Darren McFadden returned to practice Tuesday after missing two weeks with a hamstring injury. He looked like someone well-rested, showing a burst that had teammates ooohing and ahhhing during one team drill. The Raiders also have a quality back in Michael Bush.

The Oakland Raiders placed backup quarterback Charlie Frye on injured reserve Thursday with a right wrist issue. Tom Cable said it will take four to five months for Frye to rehabilitate the hurt ligament. Frye underwent surgery earlier this week and will miss the entire season.

Giants quarterback Eli Manning could miss the team's preseason game against the Steelers this week. Manning suffered a gash that required 12 stitches during Monday night's 31-16 win over the Jets. Since then, he hasn't been able to put on a helmet. "Initially, with Eli being the kind of guy he is, the idea for me going forward was: 'How are we going to make it so he can practice and play with the stitches?' " coach Tom Coughlin said. "There is concern there from the doctor's standpoint, because the nature of where the helmet sits according to where the stitches are could create a problem in terms of healing."

The Raiders will allow cornerback Nnamdi Asomugha to roam the field and play on both the left and right side this season. Asomugha has been almost glued to the right side in his career. "Every year there are times when it happens but this year I just think it will happen more because we're doing it [in practice] more and they're allowing it to happen more," Asomugha said. "Me being able to play in the slot on third down ... I've wanted that for a while."

Charlie Frye, who was supposed to fight for the second string quarterback job with Oakland, has a mysterious hand injury. "There's so many things in your hand," said Frye, who has been out nine days with a sore and a braced-up wrist. "I guess they just want to find out some more about what's going on in there, because I can't throw a football." With Frye's injury a concern, the Raiders signed Colt Brennan as insurance behind Jason Campbell and Kyle Boller.