St. Louis Rams wide receiver Brandon Gibson, left, reaches for a pass as cornerback Chris Smith defends during NFL football training camp Thursday, Aug. 4, 2011, in St. Louis. (AP Photo/Jeff Roberson)

Philadelphia Eagles wide receiver Sinorice Moss reacts after catching a pass during NFL football training camp at Lehigh University Thursday, Aug. 4, 2011 in Bethlehem, Pa. (AP Photo/Alex Brandon)

Cleveland Browns guard Shawn Lauvao, left, and defensive tackle Phil Taylor get tangled up during practice at the NFL football team's training camp on Thursday, Aug. 4, 2011, in Berea, Ohio. (AP Photo/Tony Dejak)

A member of the Baltimore Ravens staff records practice from a lift during NFL football training camp in Owings Mills, Md., Thursday, Aug. 4, 2011. (AP Photo/Patrick Semansky)

New York Jets running back Chris Jennings runs through a machine while protecting the ball during NFL football training camp Thursday, Aug. 4, 2011, in Florham Park, N.J. (AP Photo/Julio Cortez)

Oakland Raiders safety Stevie Brown hits a blocking sled during their NFL football training camp in Napa, Calif.,Thursday, Aug. 4, 2011. (AP Photo/Eric Risberg)

Seattle Seahawks' Marshawn Lynch is grabbed by his jersey on a run at NFL football training camp on Thursday, Aug. 4, 2011, in Renton, Wash. (AP Photo/Elaine Thompson)

Miami Dolphins' Quinton Spears, left, and Jason Taylor practice a drill during NFL football training camp in Davie, Fla., Thursday, Aug. 4, 2011. (AP Photo/Hans Deryk)

New York Giants wide receiver Hakeem Nicks catches a pass during NFL football training camp Thursday, Aug. 4, 2011 in East Rutherford, N.J. (AP Photo/Bill Kostroun)

Pittsburgh Steelers cornerback Willie Gay makes a catch during drills at NFL football training camp in Latrobe, Pa., on Thursday, Aug. 4, 2011. (AP Photo/Keith Srakocic)

Buffalo Bills' Craig Davis makes a catch during NFL football training camp Thursday, Aug. 4, 2011, in Pittsford, N.Y. (AP Photo/David Duprey)

Actor Paul Reubens, left, dressed as character Pee-wee Herman, looks at a photo with Dallas Cowboys quarterback Tony Romo at NFL football training camp, Thursday, Aug. 4, 2011, in San Antonio. (AP Photo/Darren Abate)

Dallas Cowboys' Dez Bryant, left, is slowed by Orlando Scandrick during NFL football training camp Thursday, Aug. 4, 2011, in San Antonio. (AP Photo/Darren Abate)

Houston Texans tackle Rashad Butler, center, runs with teammates during an NFL football training camp practice Friday, Aug. 5, 2011, in Houston. (AP Photo/David J. Phillip)

New York Jets wide receiver Santonio Holmes, top, makes a catch as cornerback Darrelle Revis (24) defends during NFL football training camp at the team's practice facility in Florham Park, N.J., Friday, Aug. 5, 2011. (AP Photo/Rich Schultz)

Cincinnati Bengals' halfback John Griffin has his face mask grabbed by cornerback Fred Bennett, right, during a scrimmage at NFL football training camp on Friday, Aug. 5, 2011, in Georgetown, Ky. (AP Photo/Al Behrman)

Baltimore Ravens quarterback Joe Flacco, at left in red, takes the hike as his teammates run a play during NFL football training camp in Baltimore, Saturday, Aug. 6, 2011. (AP Photo/Patrick Semansky)

Carolina Panthers quarterback Cam Newton (1) signs autographs after practice at the NFL football team's training camp in Spartanburg, S.C., Sunday, July 31, 2011. (AP Photo/Chuck Burton)

Chicago Bears wide receiver Kris Adams catches a ball during NFL football training camp on Sunday, July 31, 2011, at Olivet Nazarene University in Bourbonnais, Ill. (AP Photo/Nam Y. Huh)

Atlanta Falcons defensive end Cliff Matthews works on his kick blocking skills during their NFL football training camp workout in Flowery Branch, Ga., Monday, Aug. 1, 2011. (AP Photo/John Bazemore)

Houston Texans defensive tackle Earl Mitchell sprays water on his face during an NFL football training camp practice Monday, Aug. 1, 2011, in Houston. (AP Photo/David J. Phillip)

Detroit Lions quarterback Matthew Stafford signs autographs after their NFL football training camp practice in Allen Park, Mich., Monday, Aug. 1, 2011. (AP Photo/Paul Sancya)

Denver Broncos rookie linebacker Derek Domino from South Dakota State catches a pass during training camp at the Denver Broncos football training facility in Englewood, Colo., on Monday, Aug. 1, 2011.(AP Photo/Jack Dempsey)

Philadelphia Eagles linebacker Keenan Clayton, left, gets a head butt and an ear full from defensive coordinator Juan Castillo, right, during the morning session of NFL football training camp at Lehigh University in Bethlehem, Pa. on Monday, August 1, 2011. (AP Photo/Rich Schultz)

Dallas Cowboys' Jeff Moturi, left, and Mike Jenkins go through drills during an NFL football training camp, Monday, Aug. 1, 2011, in San Antonio. (AP Photo/Darren Abate)

Philadelphia Eagles wide receiver Gerald Jones makes a catch during the morning session of NFL football training camp at Lehigh University in Bethlehem, Pa. on Monday, August 1, 2011. (AP Photo/Rich Schultz)

San Diego Chargers wide receiver Vincent Brown makes a catch during the second day of theur NFL football training camp in San Diego, Friday, July 29, 2011. (AP Photo/Denis Poroy)

July 30, 2011; St. Louis, MO, USA; St. Louis Rams running back Keith Toston (38) falls forward while carrying the ball during training camp at Russell Training Center. Mandatory Credit: Jeff Curry-US PRESSWIRE

Seattle Seahawks' Mike Williams, top, leaps for a pass in front of Kennard Cox (39) during NFL football training camp Saturday, July 30, 2011, in Renton, Wash. (AP Photo/Elaine Thompson)

Denver Broncos defensive end Elvis Dumervil (92) works out during NFL football training camp on Saturday, July 30, 2011, at the team's practice facility in Englewood, Colo. (AP Photo/Barry Gutierrez)

Cleveland Browns wide receiver Josh Cribbs makes a catch on the sidelines during practice during the NFL football training camp in Berea, Ohio Saturday, July 30, 2011. (AP Photo/Mark Duncan)

Baltimore Ravens running back Walter Sanders takes a sip of water during NFL football training camp at the team's practice facility in Owings Mills, Md., Saturday, July 30, 2011. (AP Photo/Patrick Semansky)

St. Louis Rams defensive tackle Jermelle Cudjo cools off during a break in practice at NFL football training camp, Saturday, July 30, 2011, at the team's training facility in St. Louis. (AP Photo/Jeff Roberson)

San Diego Chargers quarterback Philip Rivers, left, throws to tight end Kory Sperry during the first day of NFL football training camp in San Diego, Thursday, July 28, 2011. (AP Photo/Chris Carlson)

Jacksonville Jaguars fans are silhouettes as they watch their NFL football team's training camp practice session from atop the bleachers Thursday evening, July 28, 2011 in Jacksonville, Fla. (AP Photo/Rick Wilson)

Baltimore Ravens running back Anthony Allen, left, flips his hair back before putting his helmet on during NFL football training camp at the team's practice facility in Owings Mills, Md., Friday, July 29, 2011. Also pictured is running back Matt Lawrence. (AP Photo/Patrick Semansky)

Water runs down the face of Baltimore Ravens running back Ray Rice during NFL football training camp at the team's practice facility in Owings Mills, Md., Friday, July 29, 2011. (AP Photo/Patrick Semansky)

Pittsburgh Steelers running back Rashard Mendenhall cools off during the NFL football team's training camp session in Latrobe, Pa., Friday, July 29, 2011. (AP Photo/Gene J. Puskar)

Kansas City Chiefs coach Todd Haley stands between the offense and defense during NFL football training camp in St Joseph, Mo., Friday, July 29, 2011. (AP Photo/Orlin Wagner)

New Orleans Saints wide receiver John Chiles (left) catches a pass in front of linebacker Ramon Humber (right) during the first day of training camp at the New Orleans Saints practice facility on July 29, 2011 in Metairie, LA. (Derick E. Hingle/US Presswire)

Baltimore Ravens quarterback Joe Flacco moves the ball during a drill on the first day of NFL football training camp Thursday, July 28, 2011 in Owings Mills, Md.(AP Photo/Gail Burton)

Dallas Cowboys rookie Tyron Smith, right, goes through drills with teammates during NFL football practice Thursday, July 28, 2011, in San Antonio. (AP Photo/Eric Gay)

New Orleans Saints linebacker Jonathan Casillas (52) dives for a tackling drill during the first day of training camp at the New Orleans Saints practice facility on July 29, 2011 in Metairie, LA. (Derick E. Hingle/US Presswire)

Dallas Cowboys quarterbacks, from left,Tony Romo, Jon Kitna, center, and Stephen McGee take part in a drill during NFL football training camp, Friday, July 29, 2011, in San Antonio. (AP Photo/Eric Gay)

Miami Dolphins wide receiver Brandon Marshall completes a pass during the first day of practice at NFL football training camp in Davie, Fla., Friday, July 29, 2011, in Miami, (AP Photo/Alan Diaz)

New Orleans Saints quarterback Drew Brees (9) throws during a team drill on the first day of training camp at the New Orleans Saints practice facility on July 29, 2011 in Metairie, LA. (Derick E. Hingle/US Presswire)

Seattle Seahawks' Caz Piurowski dives onto a mat during a drill at a walkthrough NFL football practice to open training camp on Thursday, July 28, 2011, in Renton, Wash. (AP Photo/Elaine Thompson)

Jacksonville Jaguars quarterback David Garrard (9) throws a pass to follow quarterback Luke McCown (12) as they warm up prior to the start of the team's first training camp practice session of the season Thursday morning, July 28, 2011, in Jacksonville, Fla. (AP Photo/Rick Wilson)

New England Patriots safety Brandon Meriweather reaches for the football during the NFL team's training camp in Foxborough, Mass., Thursday, July 28, 2011. (AP Photo/Charles Krupa)

Seattle Seahawks Red Bryant crashes between tackling dummies at a walk-through practice to open NFL football training camp Thursday, July 28, 2011, in Renton, Wash. (AP Photo/Elaine Thompson)

Baltimore Ravens coach John Harbaugh reacts during the first day of NFL football training camp Thursday, July 28, 2011 in Owings Mills, Md.(AP Photo/Gail Burton)

Baltimore Ravens coach John Harbaugh works with tight end Davon Drew during the first day of NFL football training camp Thursday, July 28, 2011 in Owings Mills, Md.(AP Photo/Gail Burton)

Dallas Cowboys' Igor Olshansky (99) and Mace Keenan (69) take part in a morning walk through at NFL football training camp, Thursday, July 28, 2011 in San Antonio. (AP Photo/Eric Gay)

Dallas Cowboys quarterback Tony Romo drops back to pass during a morning walk through at NFL football training camp, Thursday, July 28, 2011 in San Antonio. Cowboys' Chris Gronkowski (44) is at left. (AP Photo/Eric Gay)

New England Patriots quarterback Tom Brady hands off to wide receiver Julian Edelman during an NFL football training camp in Foxborough, Mass., Thursday, July 28, 2011. (AP Photo/Charles Krupa)

New England Patriots quarterback Tom Brady signs autographs for fans after an NFL football training camp in Foxborough, Mass., Thursday, July 28, 2011. (AP Photo/Charles Krupa)

Tampa Bay Buccaneers first round draft pick, defensive end Adrian Clayborn speaks to the media after arriving for reporting day at team's NFL football training camp on Thursday, July 28, 2011, in Tampa. (AP Photo/Brian Blanco)

New England Patriots quarterbacks Brian Hoyer (left) , Tom Brady (center) and Jonathan Crompton (right) takes snaps from offensive linemen Marcus Cannon (left) , Dan Koppen (center) and Thomas Austin (right) during training camp at the Patriots practice facility on July 28, 2011 in Foxborough, MA. (Stew Milne/US Presswire)

Tampa Bay Buccaneers quarterback Josh Freeman, left, laughs as he is asked a question by Buccaneers' defensive tackle Gerald McCoy, right, as Freeman speaks to the media during reporting day for the team's football football training camp on Thursday, July 28, 2011 in Tampa, Fla. (AP Photo/Brian Blanco)

Denver Broncos quarterback Tim Tebow drops back to pass during NFL football training camp in Englewood, Colo., on Thursday, July 28, 2011.(AP Photo/Ed Andrieski)

Denver Broncos quarterback Tim Tebow, center, stretches with teammates during NFL football training camp in Englewood, Colo., on Thursday, July 28, 2011.(AP Photo/Ed Andrieski)

Denver Broncos quarterback Kyle Orton stretches during NFL football training camp in Englewood, Colo., on Thursday, July 28, 2011.(AP Photo/Ed Andrieski)

Jacksonville Jaguars running back DuJuan Harris, left, is tapped down by safety Chris Prosinski during the NFL football team's first training camp practice session of the season Thursday morning, July 28, 2011, in Jacksonville, Fla. (AP Photo/Rick Wilson)

Philadelphia Eagles wide receiver Jason Avant catches a pass during their NFL football training camp practice at Lehigh University Friday, July 29, 2011 in Bethlehem, Pa. (AP Photo/Alex Brandon)

Philadelphia Eagles linebacker Ricky Sapp, left, and defensive end Victor Abiamiri participate in a fumble drill during their NFL football training camp practice at Lehigh University Friday, July 29, 2011 in Bethlehem, Pa. (AP Photo/Alex Brandon)

New England Patriots quarterback Tom Brady, right, shakes hands with wide receiver Chad Ochocinco during an NFL football training camp in Foxborough, Mass., Friday, July 29, 2011. (AP Photo/Charles Krupa)

Washington Redskins safety Chris Horton, left, sits in an ice tub next to rookie offensive lineman Maurice Hurt after practice at NFL football camp on Friday, July 29, 2011, in Ashburn, Va. (AP Photo/Evan Vucci)

Miami Dolphins wide receiver Devone Bess prepares to make a catch during the first day of practice at NFL football training camp in Davie, Fla., Friday, July 29, 2011, in Miami, (AP Photo/Alan Diaz)

Newly-acquired safety Jonathon Amaya participates in the New Orleans Saints practice at the team's NFL football training facility, Friday, July 29, 2011, in Metairie, La. This is the Saints first practice session. (AP Photo/Bill Haber)

A general view of the field during the first day of training camp at the New Orleans Saints practice facility on July 29, 2011 in Metairie, LA. (Derick E. Hingle/US Presswire)

Washington Redskins tight end Logan Paulsen signs autographs for fans after practice at the NFL football team's training camp, Saturday, July 30, 2011, at Redskins Park in Ashburn, Va. (AP Photo/Nick Wass)

Carolina Panthers' Cam Newton smiles as he looks through a camera as members of the media interview teammate Olindo Mare at the NFL football team's training camp in Spartanburg, S.C., Saturday, July 30, 2011. (AP Photo/Chuck Burton)

New England Patriots receivers Chad Ochocinco, left, and Deion Branch talk during NFL football training camp practice in Foxborough, Mass. Saturday, July 30, 2011. (AP Photo/Winslow Townson)

Philadelphia Eagles wide receiver Chad Hall (16) makes a catch during the morning session of NFL football training camp at Lehigh University in Bethlehem, Pa. on Saturday, July 30, 2011. (AP Photo/Rich Schultz)

Jul 30, 2011; Green Bay, WI, USA; Green Bay Packers safety Nick Collins (36) greets fans as he rides a bike to training camp practice outside Lambeau Field. Mandatory Credit: Jeff Hanisch-US PRESSWIRE

Cleveland Browns tight end Alex Smith, top, catches a pass against linebacker D'Qwell Jackson (52) at the NFL football team's training camp in Berea, Ohio Sunday, July 31, 2011. (AP Photo/Mark Duncan)

Philadelphia Eagles' Curtis Marsh, left, knocks the ball away from teammate Riley Cooper, right, during the morning session of NFL football training camp at Lehigh University in Bethlehem, Pa., on Sunday, July 31, 2011. (AP Photo/Rich Schultz)