Minnesota Vikings defensive end Everson Griffen, right, sacks Chicago Bears quarterback Jay Cutler during the first half of an NFL football game Sunday, Dec. 9, 2012, in Minneapolis. (AP Photo/Genevieve Ross)
Minnesota Vikings running back Adrian Peterson (28) runs from Chicago Bears safety Major Wright, left, during the first half of an NFL football game Sunday, Dec. 9, 2012, in Minneapolis. (AP Photo/Andy King)
Indianapolis Colts' Andrew Luck (12) throws during the second half of an NFL football game against the Tennessee Titans Sunday, Dec. 9, 2012, in Indianapolis. (AP Photo/Michael Conroy)
Washington Redskins quarterback Kirk Cousins spikes the ball after a two point conversion to tie the game and force overtime during the second half of an NFL football game against the Baltimore Ravens in Landover, Md., Sunday, Dec. 9, 2012. (AP Photo/Patrick Semansky)
Washington Redskins wide receiver Pierre Garcon, right, pushes Baltimore Ravens cornerback Cary Williams away during the first half of an NFL football game in Landover, Md., Sunday, Dec. 9, 2012. (AP Photo/Nick Wass)
Baltimore Ravens defensive end Arthur Jones pulls Washington Redskins quarterback Robert Griffin III to the ground during the second half of an NFL football game in Landover, Md., Sunday, Dec. 9, 2012. (AP Photo/Nick Wass)
Dallas Cowboys nose tackle Josh Brent runs onto the field from the team's tunnel after being introduced before an NFL football game against the Philadelphia Eagles in Arlington, Texas, on Sunday, Dec. 2, 2012. (AP Photo/Tony Gutierrez)
Baltimore Ravens running back Ray Rice carries the ball during the first half of an NFL football game against the Pittsburgh Steelers in Baltimore, Sunday, Dec. 2, 2012. (AP Photo/Nick Wass)
Washington Redskins quarterback Robert Griffin III scrambles with the ball during the first half of an NFL football game against the New York Giants in Landover, Md. Monday, Dec. 3, 2012. (AP Photo/Nick Wass)
Pittsburgh Steelers quarterback Ben Roethlisberger watches the action from the sidelines during the first half of an NFL football game against the Baltimore Ravens in Baltimore, Sunday, Dec. 2, 2012. (AP Photo/Gail Burton)
New York Jets quarterback Mark Sanchez reacts during the second half of an NFL football game against the Arizona Cardinals, Sunday, Dec. 2, 2012, in East Rutherford, N.J. (AP Photo/Bill Kostroun)