Lofton interviewed last week with coach Lane Kiffin and offensive coordinator Greg Knapp before negotiating a contract with owner Al Davis.
Lofton, who played two seasons for the Raiders during his career, had interviewed the past two seasons to be the team's head coach, but lost out to Art Shell in 2006 and Kiffin a year ago.
The addition of Lofton is the first major change on Kiffin's coaching staff for his second season. Kiffin's status on the Raiders was in question after reports that Davis had asked him to resign following a 4-12 season. The Raiders have denied the report and Kiffin has said he "hopes" to be the coach in 2008.
The Raiders are looking for significant improvement from their receiving corps. Kiffin was unhappy with the progress Ronald Curry made under former receivers coach Charles Coe, who will be reassigned.
Curry led the team with 55 catches for 717 yards and five touchdowns, but had only 11 receptions in the final five games. Jerry Porter had 44 catches for 705 yards and six scores, but is eligible to be a free agent.
No other wide receiver had more than 10 catches on the season, with third-round pick Johnnie Lee Higgins getting only six in his rookie season.
Copyright 2007 by The Associated Press