Whitehurst
The Seahawks swapped the 40th pick in the second round with San Diego's 60th pick and also will send the Chargers a third-round pick in the 2011 draft.
Seattle, meanwhile, has signed Whitehurst to a two-year, $8 million contract, with $2 million more in incentives.
The Chargers now have three third-round picks in 2011. They earlier acquired the New York Jets' third-round pick next year in exchange for cornerback Antonio Cromartie.
Whitehurst, a restricted free agent with third-round compensation, has had only four NFL snaps and has not thrown a pass in a regular-season game. The Clemson product signed his one-year restricted tender Wednesday, which facilitated the trade, after deciding he preferred to play in Seattle instead of Arizona.
Matt Hasselbeck, 34, remains Seattle's starting quarterback, but the 27-year-old Whitehurst could be viewed as the quarterback for the future.
The Cardinals agreed to a contract Wednesday with former Cleveland Browns quarterback Derek Anderson.
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