Robertson is set to sign a two-year, $9.25 million contract with the Lions, Tom Pelissero of NFL Network reports.
Robertson will now join Carlton Davis as part of Detroit's attempt to rebuild its secondary, which was a weak point last season. The 2020 fourth-round selection has mostly operated out of the slot in his four years with the Raiders. The Louisiana Tech product notched 50 combined tackles last season while also recording six passes defended, including two interceptions.