Even as Oakland officials bide their time, waiting for an opportunity to meet with Pittsburgh Steelers offensive coordinator Ken Whisenhunt after Super Bowl XL, the Raiders added to their list of head coach candidates. Owner Al Davis and other Raiders officials spent much of Thursday interviewing former St. Louis Rams coach Mike Martz about the vacancy created by the Jan. 3 dismissal of Norv Turner following just two seasons and a 9-23 record. It is believed that Martz requested the session and that Davis, who loves to pick the brains of coaches around the league, was quick to arrange the interview. Martz became the fifth known candidate for the job. The Raiders previously interviewed former Kansas City offensive coordinator Al Saunders, former Tampa Bay defensive line coach Rod Marinelli, current San Diego wide receivers coach James Lofton and current Oakland quarterbacks coach John Shoop, who is still under contract.