Walker spent last year with Vikings
Walker, a seven-year veteran, spent last season with the Minnesota Vikings, where he had 58 tackles and one interception.
"Denard is a welcome addition, as he is a highly productive pro football player," Raiders coach Norv Turner said. "We're pleased to have him join what is an already talented group of defensive backs."
The Raiders, who went 4-12 last season, signed cornerback Ray Buchanan last month. They also designated cornerback Charles Woodson as their franchise player and have Phillip Buchanon and Nnamdi Asomugha.
"I'm excited about joining the Raiders and it feels like it was a long time coming," Walker said. "I feel very fortunate and look forward to contributing to the Raiders' success in 2004."
Walker also played two seasons with Denver and four with Tennessee.
Copyright 2004 by The Associated Press