Las Vegas will give Hayward a one-year deal worth up to $4 million, a source told NFL reporter Josina Anderson.
The Los Angeles Chargers cut Hayward earlier this offseason after five seasons. The 31-year-old will be reunited with Raiders defensive coordinator Gus Bradley, who coached him from 2017-2020 in L.A.
A two-time Pro Bowler, Hayward has recorded 23 career interceptions and 100 pass breakups.
Las Vegas finished the season with the 26th-ranked pass defense and allowed 29.9 points per game.