Here's a question I can't find an answer to: Let's say that Jamarcus Russell just doesn't sign, maybe two games into the pre-season. And say Al Davis gets tired of it and, being Al Davis, decides to dump Russell. So he trades Russell to another team with a lot of salary cap room. But that team has already used up its rookie pool money to sign its draft picks.

Where does the money come from to sign Russelll? Can it come from the sal cap at large? Or can the trade not be made because the team has used its rookie pool money?