Chris Johnson, RB, Tennessee Titans (AP Photo/Elaine Thompson)

Adrian Peterson, RB, Minnesota Vikings (AP Photo/Paul Abell)

Maurice Jones-Drew, RB, Jacksonville Jaguars (AP Photo/Michael Perez)

Ray Rice, RB, Baltimore Ravens (AP Photo/Robert E. Klein)

Frank Gore, RB, San Francisco 49ers (AP Photo/Paul Spinelli)

Aaron Rodgers, QB, Green Bay Packers (AP Photo/Paul Jasienski)

Michael Turner, RB, Atlanta Falcons (AP Photo/Paul Abell)

Drew Brees, QB, New Orleans Saints (AP Photo/Paul Jasienski)

Andre Johnson, WR, Houston Texans (AP Photo/Dave Einsel)

Peyton Manning, QB, Indianapolis Colts (AP Photo/Paul Abell)

Rashard Mendenhall, RB, Pittsburgh Steelers (AP Photo/Don Wright)

Ryan Mathews, RB, San Diego Chargers (AP Photo/Paul Spinelli)

Steven Jackson, RB, St. Louis Rams (AP Photo/Paul Sancya)

Cedric Benson, RB, Cincinnati Bengals(AP Photo/David Stluka)

Larry Fitzgerald, WR, Arizona Cardinals (AP Photo/David Stluka)

Shonn Greene, RB, New York Jets (Gary A. Vasquez/NFL.com)

Jamaal Charles, RB, Kansas City Chiefs (AP Photo/Jack Dempsey)

Randy Moss, WR, New England Patriots (AP Photo/ David Duprey)

DeAngelo Williams, RB, Carolina Panthers (AP Photo/David Drapkin)

Reggie Wayne, WR, Indianapolis Colts (AP Photo/Nick Wass)