Jason Campbell dealing with wrist injury

Besides his stinger, Oakland Raiders quarterback Jason Campbell has more serious issues.

Campbell has a right wrist injury that's regarded as more significant than the stinger, according to Raiders coach Tom Cable.

Per the report, Campbell has already had a magnetic resonance imaging exam and X-rays.

Meanwhile, running back Michael Bush will have surgery on his broken left thumb.

He hasn't been ruled out for the season opener.

And wide receiver Chaz Schilens is out for three to six weeks after undergoing arthroscopic knee surgery.

During their loss to the San Francisco 49ers, Campbell was carted off the field when he suffered a stinger.

He was on the ground for several minutes in the second quarter after being sacked by Travis LaBoy.

Campbell was replaced by Bruce Gradkowski.

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