The Raiders placed quarterback Daunte Culpepper and running back Justin Fargas on the injured reserve list Wednesday, officially ending their seasons - and quite possibly their careers in Oakland - one week early. Culpepper, who signed a one-year contract in training camp, missed the past four games with a quad injury. Fargas, an unrestricted free agent, incurred a knee sprain two weeks ago. Both were replaced on the roster by practice squad offensive linemen for Sunday's season finale against the visiting Chargers. Culpepper isn't likely to return because he wants to be an NFL starter, and No. 1 overall draft pick JaMarcus Russell figures to take over fulltime next season. Fargas is looking at a big payday on the free-agent market after his first 1,000-yard season. He set career highs with 222 carries for 1,009 yards and four touchdowns in seven starts before spraining knee ligaments against the Colts.