Washington Redskins quarterback Robert Griffin III, left, and offensive coordinator Kyle Shanahan, right, before an NFL football game against the Cleveland Browns in Cleveland, Sunday, Dec. 16, 2012. (AP Photo/Rick Osentoski)
Denver Broncos quarterback Peyton Manning steps back to pass against the Kansas City Chiefs in the fourth quarter of an NFL football game, Sunday, Dec. 30, 2012, in Denver. (AP Photo/Jack Dempsey)
Cincinnati Bengals quarterback Andy Dalton looks to pass against the Baltimore Ravens in the first half of an NFL football game, Sunday, Dec. 30, 2012, in Cincinnati. (AP Photo/Tom Uhlman)
San Francisco 49ers quarterback Colin Kaepernick (7) passes against the Arizona Cardinals during the first quarter of an NFL football game in San Francisco, Sunday, Dec. 30, 2012. (AP Photo/Tony Avelar)
Arizona Cardinals head coach Ken Whisenhunt watches his team prior to an NFL football game against the Chicago Bears, Sunday, Dec. 23, 2012, in Glendale, Ariz. (AP Photo/Paul Connors)
Philadelphia Eagles head coach Andy Reid watches his team warm up before an NFL football game against the New York Giants, Sunday, Dec. 30, 2012 in East Rutherford, N.J. (AP Photo/Kathy Willens)
Washington Redskins quarterback Robert Griffin III (10) reacts as running back Alfred Morris (46) heads for a touchdown during the second half of an NFL football game against the Dallas Cowboys on Sunday, Dec. 30, 2012, in Landover, Md. (AP Photo/Richard Lipski)
Washington Redskins running back Alfred Morris is tackled by Dallas Cowboys nose tackle Sean Lissemore (95) and defensive end Jason Hatcher (97) during the first half of an NFL football game Sunday, Dec. 30, 2012, in Landover, Md. (AP Photo/Alex Brandon)
Philadelphia Eagles head coach Andy Reid walks on the field before an NFL football game against the New York Giants, Sunday, Dec. 30, 2012, in East Rutherford, N.J. (AP Photo/Bill Kostroun)
Denver Broncos quarterback Peyton Manning (18) congratulates Denver Broncos wide receiver Demaryius Thomas (88) after a touchdown in the third quarter of an NFL football game against the Kansas City Chiefs, Sunday, Dec. 30, 2012, in Denver. (AP Photo/Jack Dempsey)
New York Jets quarterback Tim Tebow (15) talks with head coach Rex Ryan, far right, in the first quarter of an NFL game against the Tennessee Titans on Monday, Dec. 17, 2012, in Nashville, Tenn. (AP Photo/Joe Howell)