The Oakland Raiders released linebacker Kamerion Wimbley on Friday.Wimbley was one year into a $48 million, five-year deal and was cut because he was unable to work out a restructured contract with the Raiders."We tried feverishly to work it out, but we couldn't," Wimbley's agent Joe Linta said. "The Raiders' salary-cap and cash constraints were too great to get anything done."The 28-year-old was paid $5 million in 2011 and is still guaranteed an additional $6.5 million from the Raiders. Wimbley was due a roster bonus of an additional $4.5 million Wednesday.Wimbley had seven sacks and an interception in 16 games for Oakland last season.