MINNEAPOLIS - NOVEMBER 15: Adrian Peterson #29 of the Minnesota Vikings carries the ball as Phillip Buchanon #31 of the Detroit Lions...

Minnesota Vikings running back Adrian Peterson (28) runs in the NFL football game against the Pittsburgh Steelers in Pittsburgh, Oct. 25, 2009...

MINNEAPOLIS - SEPTEMBER 27: Adrian Peterson #28 of the Minnesota Vikings carries the ball during an NFL game against the San Francisco...

Minnesota Vikings quarterback Brett Favre celebrates after a a touchdown by Adrian Peterson during the fourth quarter of an NFL football game Sunday, Oct. 11, 2009, in St. Louis...

Oct 18, 2009; Minneapolis, MN, USA; Minnesota Vikings running back Adrian Peterson (28) rushes for 26 yards as Baltimore Ravens safety Ed Reed (20) pursues him in the...

Minnesota Vikings quarterback Brett Favre, right, and running back Adrian Peterson celebrate as they come off the field after Peterson scored a touchdown against the St. Louis...

October 11, 2009; St. Louis, MO, USA; Minnesota Vikings running back Adrian Peterson (28) runs the ball as St. Louis Rams safety Craig Dahl (43) defends in the first...

Minnesota Vikings running back Adrian Peterson, left, crosses into the end zone on a five-yard touchdown run as St. Louis Rams...

DETROIT - SEPTEMBER 20: Adrian Peterson #28 of the Minnesota Vikings fumbles a hand off from Brett Favre #4 in the first...

MINNEAPOLIS, MN - SEPTEMBER 27: Quarterback Brett Favre #4 of the Minnesota Vikings celebrates with teammate Adrian Peterson #28 after defeating the San Francisco 49ers 27-24 at Hubert H. Humphrey Metrodome on September...

09 November 2008: Minnesota Vikings running back Adrian Peterson (28) runs for what would be the game winning touchdown against Green Bay Packers safety Atari...

MINNEAPOLIS - NOVEMBER 4: Adrian Peterson #28 of the Minnesota Vikings runs the ball against the San Diego Chargers on Sunday, November...

Minnesota Vikings running back Adrian Peterson runs against the Detroit Lions in the second quarter of an NFL football game in Detroit...

CLEVELAND, OH - SEPTEMBER 13: Adrian Peterson #28 of the Minnesota Vikings rushes against the Cleveland Browns on September 13, 2009 at Cleveland...

...2009 1:43:05 PM CAPTION: Sep 13, 2009; Cleveland, OH, USA; Minnesota Vikings running back Adrian Peterson (28) runs with the ball against the Cleveland Browns at Cleveland Browns Stadium. Mandatory Credit: Matthew...