The Raiders are scheduled to pay the 33-year-old Palmer $13 million this season.
He passed for 4,018 yards with 22 touchdowns and 14 interceptions last season for the Raiders, who acquired the quarterback from the Cincinnati Bengals during the 2011 season for a 2012 first-round draft pick and a second-round selection in the 2013 draft.
The Bengals picked cornerback Dre Kirkpatrick with the 17th overall selection acquired from the Raiders in last year's draft.
Oakland also is trying to design packages to give quarterback Terrelle Pryor a chance to get on the field and to help the team win. New offensive coordinator Greg Olson said earlier this month that it will be important to see what Pryor can do during offseason workouts and minicamps to get a better sense of what the Raiders have at quarterback.
The Raiders spent most of last season with a more traditional offense with Palmer under center. Pryor got onto the field for a few plays late in the season before finally getting the chance to start in the final game at San Diego with Palmer sidelined by cracked ribs and a bruised lung.
Pryor went 13-for-28 for 150 yards, two touchdowns and an interception in a 24-21 loss to the Chargers. He also ran for 49 yards and a score and looked more than capable running the offense.
Information from The Associated Press was used in this report.