The Oakland Raiders recently filed a grievance aimed at recouping roughly $9.5 million from former quarterback JaMarcus Russell, a source with knowledge of the situation said Thursday. The NFL Players Association is representing Russell in the matter. The Raiders are attempting to retrieve guaranteed money that was advanced to Russell in 2008. One source dubbed the potential ruling of the case as "50/50," depending on the interpretation of some language in Russell's contract. Russell's agent, Eric Metz, is quoted by Yahoo Sports!, which first reported on the grievance, as saying the money in question was fully guaranteed to the quarterback.