At 1 p.m. PDT, March 13, 2012 the NFL's free agency period starts and the Raiders must be under the salary cap. There are a number of player contracts that have not yet restructured or otherwise addressed which will likely have an impact on the salary cap and the Raiders' free agency plans. Kamerion Wimbley The two sides aren't talking and extra guarantees are triggered on Friday and Wimbley is likely to be released before they do. Wimbley's release would save the Raiders just $2 million in cap space and leave the Raiders without a strong-side linebacker on the roster. John Henderson His contract is due to pay him $4.75 million in 2012. It's far too much for part-time backup with Henderson's miles. The Raiders would save approximately $4 million by releasing Henderson, but that also leaves the Raiders with a need for a run-stuffing defensive tackle Tommy Kelly Kelly's cap number is nearly $9 million and one would expect a restructured contract would have ...