Dec 19, 2011; San Francisco, CA, USA; Pittsburgh Steelers running back Rashard Mendenhall (34) flips off the ground after being tackled against the San Francisco 49ers during the third quarter at Candlestick Park. Mandatory Credit: Jason O. Watson-US PRESSWIRE

December 19, 2011; San Francisco, CA, USA; San Francisco 49ers tight end Vernon Davis (85) dives into the end zone in front of Pittsburgh Steelers linebacker Jason Worilds (93) and linebacker Lawrence Timmons (94) after making a catch in the third quarter at Candlestick Park. Davis was called out at the one yard line. Mandatory Credit: Cary Edmondson-US PRESSWIRE

Dec 18, 2011; Orchard Park, NY, USA; Miami Dolphins cornerback Nolan Carroll (28) dives under a flying Buffalo Bills wide receiver Ruvell Martin (82) during the second half at the Ralph Wilson Stadium. Mandatory Credit: Richard Mackson-US PRESSWIRE

Atlanta Falcons wide receiver Eric Weems (14) runs as Jacksonville Jaguars linebacker Stephen Franklin (58) and Jacksonville Jaguars tight end Colin Cloherty (83) defend during the first half of an NFL football game Thursday, Dec. 15, 2011, in Atlanta. (AP Photo/Pouya Dianat)

Miami Dolphins' Devon Bess (15) can't hang on to a pass under pressure from Buffalo Bills' Justin Rogers (26) during the first half of an NFL football game in Orchard Park, N.Y., Sunday, Dec. 18, 2011. (AP Photo/Derek Gee)

Washington Redskins' Josh Wilson, right, breaks up a pass intended for New York Giants' Hakeem Nicks (88) during the second quarter of an NFL football game on Sunday, Dec. 18, 2011, in East Rutherford, N.J. (AP Photo/Bill Kostroun)

Cincinnati Bengals running back Cedric Benson (32) is upended by St. Louis Rams safety Darian Stewart, left, after running for a 5-yard gain during the first quarter of an NFL football game Sunday, Dec. 18, 2011, in St. Louis. (AP Photo/Jeff Roberson)

Tennessee Titans running back Chris Johnson (28) is tackled by Indianapolis Colts cornerback Chris Rucker (36) and linebacker Ernie Sims during the second quarter of an NFL football game in Indianapolis, Sunday, Dec. 18, 2011. (AP Photo/Darron Cummings)

Minnesota Vikings' Adrian Peterson (28) dives forward for a gain during the first half of an NFL football game against the New Orleans Saints Sunday, Dec. 18, 2011, in Minneapolis. (AP Photo/Genevieve Ross)

Buffalo Bills' C. J. Spiller (28) scores a touchdown under pressure from Miami Dolphins' Paul Soliai (96) during the first quarter of an NFL football game in Orchard Park, N.Y., Sunday, Dec. 18, 2011. (AP Photo/Gary Wiepert)

Buffalo Bills' C.J. Spiller (28) runs the ball against the Miami Dolphins during the first half of an NFL football game in Orchard Park, N.Y., Sunday, Dec. 18, 2011. (AP Photo/Gary Wiepert)

Tampa Bay Buccaneers wide receiver Dezmon Briscoe (89) is hit by Dallas Cowboys cornerback Mike Jenkins (21) as he scores on a 13-yard touchdown reception during the third quarter of an NFL football game on Saturday, Dec. 17, 2011, in Tampa, Fla. (AP Photo/Margaret Bowles)

Atlanta Falcons quarterback Matt Ryan (2) works against the Jacksonville Jaguars during the first half of an NFL football game Thursday, Dec. 15, 2011, in Atlanta. (AP Photo/Pouya Dianat)

Atlanta Falcons kicker Matt Bryant (3) kicks a field goal as Atlanta Falcons punter Matt Bosher (5) holds the ball during the first half of an NFL football game against the Jacksonville Jaguars, Thursday, Dec. 15, 2011, in Atlanta. (AP Photo/Pouya Dianat)

Atlanta Falcons wide receiver Roddy White (84) works as Jacksonville Jaguars wide receiver Akwasi Owusu-Ansah (41) defends during the first half of an NFL football game Thursday, Dec. 15, 2011, in Atlanta. (AP Photo/John Bazemore)

Atlanta Falcons wide receiver Roddy White (84) scores a touchdown against Jacksonville Jaguars cornerback Kevin Rutland (22) and cornerback Ashton Youboty (31) during an NFL football game in Atlanta, Georgia, Thursday, December 15, 2011. The Falcons won 41-14. (AP Photo/Paul Abell)

Dallas Cowboys outside linebacker Anthony Spencer (93) strips the ball from Tampa Bay Buccaneers quarterback Josh Freeman (5) during the first quarter of an NFL football game Saturday, Dec. 17, 2011, in Tampa, Fla. Dallas recovered the fumble. (AP Photo/John Raoux)

Dallas Cowboys defenders keep Tampa Bay Buccaneers running back LeGarrette Blount (27) from gaining yardage during the first half of an NFL football game Saturday, Dec. 17, 2011, in Tampa, Fla. (AP Photo/John Raoux)

Dec 17, 2011; Tampa, FL, USA; Tampa Bay Buccaneers running back Kregg Lumpkin (28) is tripped up by Dallas Cowboys inside linebacker Sean Lee (50) during the third quarter at Raymond James Stadium. Mandatory Credit: Douglas Jones-US PRESSWIRE

Detroit Lions running back Kevin Smith (30) is stopped for no gain on fourth down by the Oakland Raiders, including linebacker Aaron Curry (51) and defensive tackle Tommy Kelly (93), during the third quarter of an NFL football game in Oakland, Calif., Sunday, Dec. 18, 2011. (AP Photo/Paul Sakuma)

New England Patriots quarterback Tom Brady (12) reacts after scoring a touchdown against the Denver Broncos in the second quarter of an NFL football game, Sunday, Dec. 18, 2011, in Denver. (AP Photo/Barry Gutierrez)

Kansas City Chiefs coach Romeo Crennel gets drenched following the Chiefs' 19-14 win over the Green Bay Packers in an NFL football game, Sunday, Dec. 18, 2011, in Kansas City, Mo. (AP Photo/Reed Hoffmann)

Buffalo Bills' Ryan Fitzpatrick (14) is sacked by Miami Dolphins' Jared Odrick (98) during the second half of an NFL football game in Orchard Park, N.Y., Sunday, Dec. 18, 2011. The Dolphins won 30-23. (AP Photo/David Duprey)

Green Bay Packers quarterback Aaron Rodgers (12) is sacked by Kansas City Chiefs linebacker Tamba Hali (91) during the second half of an NFL football game Sunday, Dec. 18, 2011, in Kansas City, Mo. The Chiefs won 19-14. (AP Photo/Charlie Riedel)

Detroit Lions wide receiver Calvin Johnson (81) scores on a 51-yard touchdown reception past Oakland Raiders safety Tyvon Branch (33) during the first quarter of an NFL football game in Oakland, Calif., Sunday, Dec. 18, 2011. (AP Photo/Thomas Mendoza)

Kansas City Chiefs interim coach Romeo Crennel, front left, celebrates with Sabby Piscitelli (42), Thomas Jones (20) and Kendrick Lewis (23) after the Chiefs' 19-14 win over the Green Bay Packers in an NFL football game Sunday, Dec. 18, 2011, in Kansas City, Mo. (AP Photo/Ed Zurga)

Cleveland Browns wide receiver Mohamed Massaquoi (11) pulls in a pass as Arizona Cardinals cornerback Patrick Peterson (21) defends during the first half of an NFL football game on Sunday, Dec. 18, 2011, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Seattle Seahawks running back Marshawn Lynch, center, is tackled by Chicago Bears' Chauncey Davis (94), Amobi Okoye (91) and Craig Steltz (20) in the second half of an NFL football game in Chicago, Sunday, Dec. 18, 2011. (AP Photo/Nam Y. Huh)

Seattle Seahawks running back Justin Forsett (20) is pushed out of bounds short of the goal line by Chicago Bears safety Brandon Meriweather (31) and Chicago Bears defensive back D.J. Moore (30) in the second half of an NFL football game in Chicago, Sunday, Dec. 18, 2011. (AP Photo/Charles Rex Arbogast)

Indianapolis Colts defensive end Robert Mathis celebrates a turnover by the Tennessee Titans during the fourth quarter of an NFL football game in Indianapolis, Sunday, Dec. 18, 2011. (AP Photo/Darron Cummings)

New York Giants' Bear Pascoe, top, leaps over Washington Redskins defenders during the fourth quarter of an NFL football game on Sunday, Dec. 18, 2011, in East Rutherford, N.J. The Redskins defeated the Giants 23-10. (AP Photo/Julio Cortez)

Detroit Lions wide receiver Calvin Johnson (81) celebrates with running back Kevin Smith (30) after the Lions beat the Oakland Raiders 28-27 in an NFL football game in Oakland, Calif., Sunday, Dec. 18, 2011. (AP Photo/Paul Sakuma)