The Raiders are expected to sign Bolden on Wednesday, Ian Rapoport of NFL Network reports.
Bolden was pressed into an expanded role with the Patriots last season after James White's season-ending hip injury in Week 3 created a change-of-pace void behind the team's top early-down options, Damien Harris and Rhamondre Stevenson. With White having re-signed with New England, the versatile Bolden should handle a depth role for Las Vegas behind Josh Jacobs and Kenyan Drake.