Oakland Raiders quarterback Carson Palmer (3) sets to throw a pass in the second quarter against the San Diego Chargers in an NFL football game Thursday, Nov. 10, 2011, in San Diego. (AP Photo/Denis Poroy)

Oakland Raiders quarterback Carson Palmer (3) passes against the Kansas City Chiefs in an NFL football game in Oakland, Calif., Sunday, Oct. 23, 2011. (AP Photo/Paul Sakuma)

Oakland Raiders quarterback Carson Palmer (3) looks to throw a pass under pressure from San Diego Chargers outside linebacker Travis LaBoy (99) during the NFL game at Qualcomm Stadium in San Diego, Calif., on Thursday, Nov. 10, 2011. (Gary A. Vasquez/NFL)

Denver Broncos quarterback Peyton Manning, left, shakes hands with Oakland Raiders quarterback Carson Palmer at the end of an NFL football game in Oakland, Calif., Thursday, Dec. 6, 2012. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders quarterback Carson Palmer (3) celebrates a touchdown pass with center Samson Satele (64) and tackle Khalif Barnes (69) during the second half of an NFL football game against the Kansas City Chiefs at Arrowhead Stadium in Kansas City, Mo., Saturday, Dec. 24, 2011. (AP Photo/Ed Zurga)

Oakland Raiders quarterback Carson Palmer (3) leaves the field after the 24-17 victory against the San Diego Chargers in the NFL game at Qualcomm Stadium in San Diego, Calif., on Thursday, Nov. 10, 2011. (Gary A. Vasquez/NFL)

Oakland Raiders quarterback Carson Palmer (3) throws a pass against the San Diego Chargers during the NFL game at Qualcomm Stadium in San Diego, Calif., on Thursday, Nov. 10, 2011. (Gary A. Vasquez/NFL)

Oakland Raiders running back Darren McFadden (20), defensive tackle Tommy Kelly (93), punter Shane Lechler (9), quarterback Carson Palmer (3), Denver Broncos tight end Jacob Tamme (84), quarterback Peyton Manning (18), free safety David Bruton (30), cornerback Champ Bailey (24) and defensive end Elvis Dumervil (92) during the coin flip before an NFL game on Thursday, Dec. 6, 2012 in Oakland, Calif. The Broncos won the game, 26-13. (Ric Tapia/NFL)

Oakland Raiders quarterback Carson Palmer on the bench during an NFL game against the San Diego Chargers and Oakland Raiders, Monday, Sept. 10, 2012 in Oakland, Calif. The Chargers won the game, 22-14. (Ric Tapia/NFL)

Oakland Raiders quarterback Carson Palmer (3) during an NFL game against the New Orleans Saints on Sunday, Nov. 18, 2012 in Oakland, Calif. The Saints won the game, 38-17. (Ric Tapia/NFL)

Oakland Raiders quarterback Carson Palmer (3) passes against the Cleveland Browns during the first quarter of an NFL football game in Oakland, Calif., Sunday, Dec. 2, 2012. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders quarterback Carson Palmer throws during an NFL game against the San Diego Chargers, Monday, Sept. 10, 2012 in Oakland, Calif. The Chargers won the game, 22-14. (Ric Tapia/NFL)

Oakland Raiders quarterback Carson Palmer (3) looks for a receiver as teammates hold back Baltimore Ravens nose tackle Ma'ake Kemoeatu, second from left, in the first half of an NFL football game in Baltimore, Sunday, Nov. 11, 2012. (AP Photo/Gail Burton)

Oakland Raiders quarterback Carson Palmer drops back to throw during the first quarter of an NFL football game against the Denver Broncos in Oakland, Calif., Thursday, Dec. 6, 2012. (AP Photo/Marcio Jose Sanchez)

Quarterback Carson Palmer is introduced after signing with the Oakland Raiders at the team's NFL football headquarters in Alameda, Calif., Tuesday, Oct. 18, 2011. (AP Photo/Marcio Jose Sanchez)

Cincinnati Bengals quarterback Carson Palmer (9) passes under pressure from New Orleans Saints linebacker Jonathan Vilma, right, in the first half of an NFL football game, Saturday, Aug. 23, 2008, in Cincinnati. (AP Photo/David Kohl)

Cincinnati Bengals quarterback Carson Palmer runs the ball during the first half of an NFL football game at Giants Stadium in East Rutherford, N.J., Sunday, Sept. 21, 2008. (AP Photo/Seth Wenig)

Cincinnati Bengals quarterback Carson Palmer in action during an NFL football game against the Pittsburgh Steelers Sunday, Sept. 27, 2009, in Cincinnati. (AP Photo/Tom Uhlman)

Cincinnati Bengals quarterback Carson Palmer (9) is introduced before the start of an NFL wild-card playoff football game against the New York Jets, Saturday, Jan. 9, 2010, in Cincinnati. (AP Photo/Rob Carr)

Cincinnati Bengals quarterback Carson Palmer (9) in action against the New York Jets in the first half of an NFL wild-card playoff football game, Saturday, Jan. 9, 2010, in Cincinnati. (AP Photo/Ed Reinke)

Cincinnati Bengals quarterback Carson Palmer is knocked out of bounds by New England Patriots cornerback Devin McCourty during the second half of an NFL football game in Foxborough, Mass., Sunday, Sept. 12, 2010. (AP Photo/Winslow Townson)

Cincinnati Bengals quarterback Carson Palmer (9) in action against the Miami Dolphins in the first half of an NFL football game, Sunday, Oct. 31, 2010, in Cincinnati. (AP Photo/Ed Reinke)

Cincinnati Bengals quarterback Carson Palmer (9) plays during the NFL football game between the Pittsburgh Steelers and the Cincinnati Bengals in Pittsburgh, Sunday, Dec. 12, 2010. (AP Photo/Keith Srakocic)

In this Jan. 2, 2011, file photo, Cincinnati Bengals quarterback Carson Palmer rolls out to pass during the first half of an NFL football game against the Baltimore Ravens in Baltimore on January 2, 2011. (AP Photo/Rob Carr)

Cincinnati Bengals quarterback Carson Palmer (9) celebrates after a score during an NFL game against the Oakland Raiders, Sunday, Nov. 22, 2009 in Oakland. The Raiders won the game, 20-17. (AP Photo/Greg Trott)

Quarterback Carson Palmer #9 of the AFC Cincinnati Bengals holds up the MVP most valuable player award in front of his new Cadillac, awarded to Carson after leading his team to a win over the NFC at the 2007 NFL Pro Bowl at Aloha Stadium on February 10, 2007 in Honolulu, Hawaii. The AFC defeated the NFC 31-28. (AP Photo/Paul Spinelli)

Quarterback Carson Palmer #9 of the AFC Cincinnati Bengals unloads a pass against the NFC at the 2007 NFL Pro Bowl at Aloha Stadium on February 10, 2007 in Honolulu, Hawaii. The AFC defeated the NFC 31-28. (AP Photo/Paul Spinelli)

Cincinnati Bengals quarterback Carson Palmer fires a short pass in the first quarter against the Cleveland Browns Sunday, Sept. 11, 2005, in Cleveland, OH. (AP Photo/Scott Galvin)

Cincinnati Bengals quarterback Carson Palmer calls an audible during the second quarter against the New York Jets Sunday, Sept. 12, 2004 at Giants Stadium in East Rutherford, NJ. (AP Photo/Bill Kostroun)

Cincinnati Bengals quarterback Carson Palmer reacts after the Bengals scored a touchdown against the Atlanta Falcons in their NFL football game, Sunday, Oct. 29, 2006, in Cincinnati, OH. (AP Photo/Al Behrman)

Cincinnati Bengals guard Bobbie Williams (63) blocks Oakland Raiders defensive end Derrick Burgess as quarterback Carson Palmer (9) passes during an NFL footballl game, Sunday, Dec. 10, 2006, in Cincinnati. (AP Photo/Tom Uhlman)

Quarterback Carson Palmer #9 of the Cincinnati Bengals trots off the field after a come from behind win against the Baltimore Ravens on September 10 in Cincinnati, Ohio. The Bengals won the game 27-20. (AP Photo/Thomas E. Witte)

Quarterback Carson Palmer #9 of the Cincinnati Bengals prepares to take the field against the Baltimore Ravens during week nine NFL action on Sunday, November 8, 2009 in Cincinnati, OH. The Bengals won the game 17-7. (AP Photo/Thomas E. Witte)

Quarterback Carson Palmer #9 of the Cincinnati Bengals rushes for a first down against the Buffalo Bills during their game Sunday, November 21, 2010 in Cincinnati, OH. The Bills came from behind to win 42-31. (AP Photo/Thomas E. Witte)

Oakland Raiders quarterback Carson Palmer (3) scrambles against the San Diego Chargers during the NFL game at Qualcomm Stadium in San Diego, Calif., on Thursday, Nov. 10, 2011. (Gary A. Vasquez/NFL)

Quarterback Carson Palmer #9 of the Cincinnati Bengals passes the football in the pocket against the New England Patriots at Paul Brown Stadium on October 1, 2007 in Cincinnati, Ohio. The Patriots defeated the Bengals 34-13. (AP Photo/Scott Boehm)

Carson Palmer #9 of the Cincinnati Bengals drops back to pass against the Kansas City Chiefs on October 14, 2007 in Kansas City, Mo. Kansas City defeated Cincinnati 27-20. (AP Photo/G. Newman Lowrance)

Quarterback Carson Palmer #5 of the Cincinnati Bengals waits in the player tunnel before taking the field against the Miami Dolphins during week eight NFL action on Sunday, October 31, 2010 in Cincinnati, Ohio. The Dolphins came from behind to win 22-14 at the half. (AP Photo/Thomas E. Witte)

Carson Palmer, right, a quarterback from USC, holds up a Cincinnati Bengals jersey with NFL commissioner Paul Tagliabue after the Bengals selected him No. 1 overall in the NFL draft Saturday, April 26, 2003 in New York. (AP Photo/Ed Betz)

USC quarterback Carson Palmer speaks at a news conference after winning he Heisman Trophy at The Yale Club in New York Saturday, Dec. 14, 2002. (AP Photo/Frank Franklin II)

USC quarterback Carson Palmer holds the MVP trophy after leading the Trojans to a 38-17 win over the Iowa Hawkeyes in the 69th Annual FedEx Orange Bowl Thursday, Jan. 2, 2003, at Pro Player Stadium in Miami.(AP Photo/Wilfredo Lee)

Southern California quarterback Carson Palmer holds up a jeweled shillelagh to celebrate Southern California's 44-13 win against Notre Dame in Los Angeles, Saturday, Nov. 30, 2002. (AP Photo/Lucy Nicholson)

Southern California quarterback Carson Palmer looks for a receiver during the fourth quarter of the Kickoff Classic game against Penn State at Giants Stadium in East Rutherford, N.J. Sunday, Aug. 27, 2000. USC defeated Penn State 29-5. (AP Photo/John Greilick)