The Contra Costa (Calif.) Times said Sapp told the Raiders' managing general partner, Al Davis: "I'm done."
The 35-year-old defensive star said he told Davis of his retirement plans by telephone.
All of Sapp's Pro Bowl appearances were as a member of the Tampa Bay Buccaneers. He joined the Raiders in 2004.
Sapp finished with 96 1/2 sacks in his 13-year NFL career.
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