"The Raiders confirmed Thursday that they have filed a grievance against former quarterback JaMarcus Russell in an effort to get back $9.55 million of the $39 million they paid him.

The Raiders say the contract was changed at one point and that he's not allowed to keep all the money he collected before his May 6 release. Oakland contends that some of the money was actually an advance on his salaries for the upcoming three seasons.

Not so, Russell's agent said.

"The money in question was fully guaranteed. That is why JaMarcus was forced to hold out and miss all of training camp as a rookie," Eric Metz told Yahoo! Sports. "The Raiders know that and this is our only comment."

Russell, the No. 1 overall pick in the 2007 NFL draft, was guaranteed $32 million as part of a six-year contract reportedly worth $68 million."