LANDOVER, MD - OCTOBER 19: Shaun Alexander #37 of the Washington Redskins runs with the ball against the Cleveland Browns on October 19...

Washington Redskins running back Clinton Portis (26) walks to the sideline after being injured as Shaun Alexander (37) looks on against the Detroit Lions in the fourth quarter of an NFL football game...

...Oct. 19, 2008 file photo, Washington Redskins head coach Jim Zorn, front, stands with running back Shaun Alexander, left, in the first quarter of a football game against the Cleveland Browns in Landover, Md...

Dec 16, 2007, Charlotte, NC, USA; Seattle Seahawks running back (37) Shaun Alexander leaves the field after the Carolina Panthers 13-10 victory against the Seattle Seahawks at Bank...

SEATTLE - DECEMBER 09: Running back Shaun Alexander #37 of the Seattle Seahawks rushes against Terrence Holt #42 of the Arizona Cardinals on December...

December 30, 2007; Atlanta, GA, USA; Seattle Seahawks running back (37) Shaun Alexander on the sideline during the game against the Atlanta Falcons in the second half at the...

Shaun Alexander #37 of the Seattle Seahawks watches against the Green Bay Packers at the NFC divisional playoff...

SEATTLE - DECEMBER 9: Shaun Alexander #37 of the Seattle Seahawks carries the ball against the Arizona Cardinals December 9, 2007 at...

GREEN BAY, WI - JANUARY 12: Running back Shaun Alexander #37 of the Seattle Seahawks runs the ball as he is hit by cornerback Charles Woodson...

SEATTLE - DECEMBER 9: Running back Shaun Alexander #37 of the Seattle Seahawks rushes against Joe Tafoya #71 of the Arizona Cardinals at Qwest...

Seattle Seahawks' Shaun Alexander runs against the Green Bay Packers in a football game Monday, Nov. 27, 2006, in Seattle...

Dec 23, 2007; Seattle, WA, USA; Seattle Seahawks running back Shaun Alexander (37) scores a touchdown on a screen pass against the Baltimore Ravens in the second quarter...

CLEVELAND, OH - NOVEMBER 4, 2007: Running back Shaun Alexander #37 of the Seattle Seahawks is gang-tackled by defensive backs Daven Holly #39 and Sean...

...L-R) Frank Gore and Shaun Alexander

Sept 23, 2007; Seattle, WA, USA; Seattle Seahawks running back Shaun Alexander (37) is tackled by Cincinnati Bengals cornerback Johnathan Joseph (22) and Bengals linebacker Dhani Jones (57...