Walter, a third-round draft pick in 2005 who has been primarily a backup during his four-year NFL career, practiced with the Raiders on Thursday morning but was noticeably missing from the afternoon workout.
A few reporters bumped into Walter shortly after the afternoon practice started and he confirmed that he had been released.
The move comes as no surprise. Walter did not take part in any of the team's voluntary offseason workouts and has been seeking a trade for some time.
By releasing Walter, the Raiders also cleared up a roster spot for first-round pick Darrius Heyward-Bey, who has reportedly agreed to terms on a contract.
Discuss this story and more in the Legends Lodge.
SB Report Top Stories
Latavius Murray to test free agencyOakland Raiders starting running back Latavius Murray will reportedly test the open market
SB ReportSunday at 4:20 PM
Raiders 2017 Draft picks finalizedThe Oakland Raiders 2017 NFL Draft picks have been finalized
SB ReportSaturday at 4:36 PM
Raiders reward Jack Del Rio with new contractThe Oakland Raiders signed head coach Jack Del Rio to a new contract
Khalil Mack named AP Defensive Player of YearOakland Raiders defensive end Khalil Mack named AP Defensive Player of the Year