PHOENIX - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings accepts the 2007 Diet Pepsi NFL Rookie of the Year Award at a news conference prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings speaks to the media before accepting the 2007 Diet Pepsi NFL Rookie of the Year Award at a news conference prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings speaks to the media before accepting the 2007 Diet Pepsi NFL Rookie of the Year Award at a news conference prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings speaks to the media before accepting the 2007 Diet Pepsi NFL Rookie of the Year Award at a news conference prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings speaks to the media before accepting the 2007 Diet Pepsi NFL Rookie of the Year Award at a news conference prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: The 2007 Diet Pepsi NFL Rookie of the Year trophy is seen during a news conference as running back Adrian Peterson of the Minnesota Vikings speaks to the media prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: The 2007 Diet Pepsi NFL Rookie of the Year trophy is seen during a news conference where it was presented to running back Adrian Peterson of the Minnesota Vikings prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings speaks to the media before accepting the 2007 Diet Pepsi NFL Rookie of the Year Award at a news conference prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX - JANUARY 31: The Diet Pepsi Rookie of the Year finalist running back Marshawn Lynch of the Buffalo Bills shows finalist wide receiver Dwayne Bowe of the Kansas City Chiefs (L) his shirt with his pictures during the press conference where Adrian Peterson of the Minnesota Vikings (not pictured) accepts the 2007 Diet Pepsi Rookie of the Year Award prior to Super Bowl XLII at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Streeter Lecka/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings addresses the media at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings addresses the media at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings addresses the media at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings addresses the media at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings addresses the media at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings holds the Diet Pepsi Rookie of the Year Award after winning the trophy at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings is congratulated by running back Marshawn Lynch of the Buffalo Bills after winning the Diet Pepsi Rookie of the Year Award at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson of the Minnesota Vikings is congratulated by Mike Haynes after winning the Diet Pepsi Rookie of the Year Award at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: (Left to Right) Dwayne Bowe, Marshawn Lynch, Adrian Peterson, Joe Thomas and Patrick Willis address the media at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: (Left to Right) Marshawn Lynch, Adrian Peterson, Joe Thomas address the media at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)

PHOENIX, AZ - JANUARY 31: Running back Adrian Peterson (right) of the Minnesota Vikings holds the Diet Pepsi Rookie of the Year Award after winning the trophy as he poses with Mike Haynes at the Diet Pepsi Rookie of the Year press conference at the Phoenix Convention Center on January 31, 2008 in Phoenix, Arizona. (Photo by Scott Boehm/Getty Images)