Oregon State's Steven Jackson breaks a tackle by Southern California's Troy Polamalu as he rushes for 28 yards during the first half Saturday, Nov. 3, 2001, in Los Angeles. (AP Photo/Mark J. Terrill)

Oregon State running back Steven Jackson speaks during a news conference in Las Vegas, Tuesday, Dec. 23, 2003. Jackson, who played high school football in Las Vegas, said he will decide on joining the NFL after Wednesday's Las Vegas Bowl against New Mexico. (AP Photo/Joe Cavaretta)

Oregon State's Steven Jackson (34) tries to shake a tackle by New Mexico linebacker Mike Mohoric (56) during the third quarter at the Las Vegas Bowl Wednesday, Dec. 24, 2003, in Las Vegas. (AP Photo/Eric Jamison)

Oregon State's Steven Jackson (34) breaks Arizona State's Brett Hudson's (2) tackle during the first half in Corvallis, Ore, on Sept. 27, 2003. (AP Photo/John Gress)

Running back Steven Jackson, of Oregon State, walks along the sidelines as other players run through drills at the NFL combine in Indianapolis, Sunday, Feb. 22, 2004. (AP Photo/Michael Conroy)

St. Louis Rams running back Steven Jackson turns the corner on the Rams defense during training camp in St. Louis Friday, July 29, 2005. (AP Photo/James A. Finley)

St. Louis Rams running backs Steven Jackson (39), Dusty McGroty, (36) and Adam Mathews (26) take a break during the team's minicamp in St. Louis, Friday, April 30, 2004. (AP Photo/James A. Finley)

St. Louis Rams running back Steven Jackson steps into the end zone to score during the first half against the Philladelphia Eagles in St. Louis Monday, Dec. 27, 2004. (AP Photo/James A. Finley)

Running back Steven Jackson #39 of the St. Louis Rams competes in the Open Field competition at the 2007 NFL Pro Bowl Skills Challenge event held during the week of the 2007 NFL Pro Bowl at the Ihilani Resort Practice Field on February 8, 2007 in Kapolei, Hawaii. (AP Photo/Paul Spinelli)

Running back Steven Jackson #39 and quarterback Marc Bulger #10 of the St. Louis Rams NFC All-Stars pose with hula girls for their team picture at photo day during the 2007 NFL Pro Bowl week on February 8, 2007 in Kapolei, Hawaii. (AP Photo/Paul Spinelli)

St. Louis Rams running back Steven Jackson (39) looks for running room during an NFL game against the Oakland Raiders, Sunday, Sept. 19, 2010 in Oakland. (AP Photo/Greg Trott)

St. Louis Rams running back Steven jackson (39) takes a breather during an NFL game against the Oakland Raiders, Sunday, Sept. 19, 2010 in Oakland. (AP Photo/Greg Trott)

St. Louis Rams running back Steven Jackson poses for a portrait in the NFL studio in Culver City, Calif., on Jan. 18, 2013. (Johnny Vy/NFL)

Steven Jackson #39 of the St. Louis Rams wearing vintage eye googles prior to a game against the Carolina Panthers at the Edward Jones Dome in St. Louis, Missouri on October 31, 2010. The Rams won 20-10. (AP Photo/G. Newman Lowrance)

St. Louis Rams running back Steven Jackson is introduced before the start of an NFL football game between the St. Louis Rams and the San Francisco 49ers Sunday, Dec. 2, 2012, in St. Louis. (AP Photo/Tom Gannam)

Running back Steven Jackson #39 of the St. Louis Rams plays a game of football with actresses Eva Longoria and Felicity Huffman during the 2012 Pro Hollywood Boot Camp on the backlot at Universal Studios on April 4, 2012 in Los Angeles, California. (Johnny Vy/NFL)

St. Louis Rams quarterback Sam Bradford (8) and running back Steven Jackson (39) get set before the snap during the fourth quarter of an NFL football game against the Kansas City Chiefs Sunday, Dec. 19, 2010, in St. Louis. The Chiefs won 27-13. (AP Photo/Jeff Roberson)

St. Louis Rams runningback Steven Jackson (39) breaks tackles and scores a touchdown during the NFL AFC/NFC 2011 Pro Bowl on Sunday January 30, 2011 in Honolulu, HI. The NFC won the game 55-41. (AP Photo/ Jim Mahoney)

St. Louis Rams running back Steven Jackson (39) plays catch while on the sidelines with an injury during the NFL week 2 football game against the New York Giants on Monday, September 19, 2011 in East Rutherford, New Jersey. (AP Photo/Paul Spinelli)

St. Louis Rams Steven Jackson prepares in the locker room prior to a NFL Football game against the Cleveland Browns on November 13, 2011 in Cleveland, Ohio. St. Louis won 13-12. (AP Photo/G. Newman Lowrance)

St. Louis Rams running back Steven Jackson is introduced prior to a game against the Seattle Seahawks on November 20, 2011 in St. Louis, Mo. Seattle won 24-7. (AP Photo/G. Newman Lowrance)

St. Louis Rams running back Steven Jackson runs for yardage as he eludes Keenan Lewis of the Pittsburgh Steelers during an NFL Football game on December 24, 2011 In Pittsburgh, Pa. The Steelers won 27-0. (AP Photo/G. Newman Lowrance)

St. Louis Rams Steven Jackson speaks to the media in the locker room following a win against the Seattle Seahawks during an NFL football game on September 30, 2012 in St. Louis. The Rams won the game 19-13. (AP Photo/G. Newman Lowrance)

St. Louis Rams running back Steven Jackson runs with the ball during the first quarter of an NFL football game against the San Francisco 49ers Sunday, Dec. 2, 2012, in St. Louis. (AP Photo/Seth Perlman)

St. Louis Rams Steven Jackson runs for yardage against the Seattle Seahawks during an NFL football game Sunday, December 30, 2012 in Seattle. The Seahawks won the game 20-13. (AP Photo/G. Newman Lowrance)

St. Louis Rams running back Steven Jackson (39) leaps over a teammate during the second half of an NFL football game against the Seattle Seahawks Sunday, Sept. 30, 2012, in St. Louis. (AP Photo/Seth Perlman)

St. Louis Rams Brian Schottenheimer congratulates Steven Jackson in the locker room following a NFL football game against the Arizona Cardinals in Glendale, Ariz. on Nov. 25, 2012. The Rams defeated the Cardinals 31-17. (AP Photo/G. Newman Lowrance)

St. Louis Rams Steven Jackson is interviewed by Jennifer Hale following an NFL football game against the Arizona Cardinals in Glendale, Ariz. on Nov. 25, 2012. The Rams defeated the Cardinals 31-17. (AP Photo/G. Newman Lowrance)