St. Louis, MO -- (Sports Network) - St. Louis Rams running back Steven Jackson is expected to end his lengthy holdout.

The club's web site cited team sources close to the situation as saying Jackson would return Wednesday night and take a physical on Thursday morning.

Jackson is searching for a long-term contract extension from the club with negotiations expected to resume upon the running back's arrival.

Jackson has missed both preseason games and will likely miss Saturday's exhibition against Baltimore, regardless of a contract being finalized.

The 25-year-old is entering his fifth season in the league, all spent in St. Louis. He rushed for 1,002 yards on 237 carries with five scores and had 38 catches for 271 yards and a touchdown in 12 games of an injury-plagued 2007 campaign.

The Oregon State product earned a spot in the Pro Bowl in 2006 after rushing for 1,528 yards with 13 touchdowns and adding 806 yards on 90 receptions with three more scores.