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...

Sep 13, 2009; Cleveland, OH, USA; Minnesota Vikings running back Adrian Peterson (28) points to the fans after the game against the Cleveland Browns at Cleveland Browns Stadium...

Minnesota Vikings running back Adrian Peterson #28 in action during the Vikings 27-24 victory over the San Francisco 49ers at the...

Minnesota Vikings quarterback Brett Favre (4) hands off to running back Adrian Peterson during an NFL football game Sunday, Sept. 13, 2009, in Cleveland. (AP Photo/Ron Schwane

HOUSTON - AUGUST 31: Running back Adrian Peterson #28 of the Minnesota Vikings runs for a seventy five yard touchdown as strong safety Dominique...

HOUSTON - AUGUST 31: Running back Adrian Peterson #28 of the Minnesota Vikings breaks a tackle by cornerback Brice McCain #41 of the Houston...

Dec 14, 2008; Glendale, AZ, USA; Minnesota Vikings running back Adrian Peterson (28) runs with the ball in the second quarter of a game against the Arizona Cardinals...

NEW ORLEANS - OCTOBER 06: Adrian Peterson #28 of the Minnesota Vikings warms up against the New Orleans Saints at the Superdome on...

Dec. 14, 2008; Glendale, AZ, USA; Minnesota Vikings running back (28) Adrian Peterson against the Arizona Cardinals at University of Phoenix Stadium. Mandatory Credit: Mark J. Rebilas-US PRESSWIRE...

04 January 2009: Minnesota Vikings running back Adrian Peterson #28 up the middle for for a 40 yard touchdown in the 2nd quarter during the...

MINNEAPOLIS, MN - DECEMBER 21: Running back Adrian Peterson #28 of the Minnesota Vikings runs with the football against the Atlanta Falcons at the Hubert...

Dec. 14, 2008; Glendale, AZ, USA; Minnesota Vikings running back (28) Adrian Peterson against the Arizona Cardinals at University of Phoenix Stadium

Michael Turner and Adrian Peterson

Jan 4, 2009; Minneapolis, MN, USA: Minnesota Vikings running back Adrian Peterson (28) finds room and rushes for a 40-yard gain against the Philadelphia Eagles in the...

MINNEAPOLIS - DECEMBER 28: Adrian Peterson #28 of the Minnesota Vikings carries the ball on his way to a touchdown during an...