New Orleans Saints cornerback Laron Scott bats the ball during drills at NFL football training camp in Metairie, La., Wednesday, Aug. 1, 2012. (AP Photo/Gerald Herbert)

Seattle Seahawks' Terrell Owens catches a football during stretching drills at the start of NFL football training camp, Wednesday, Aug. 8, 2012, in Renton, Wash. (AP Photo/Ted S. Warren)

Seattle Seahawks' Terrell Owens runs during NFL football training camp, Wednesday, Aug. 8, 2012, in Renton, Wash. (AP Photo/Ted S. Warren)

New England Patriots wide receiver Wes Welker (83) catches a pass as New Orleans Saints linebacker Curtis Lofton (50) pursues during a joint NFL football practice in Foxborough, Mass., Tuesday, Aug. 7, 2012. (AP Photo/Stephan Savoia)

New England Patriots quarterback Tom Brady (12) and his two backups Brian Hoyer (8) and Ryan Mallett (15) run sprints at the end of practice during NFL football training camp in Foxborough, Mass., Thursday, Aug. 2, 2012. (AP Photo/Stephan Savoia)

New England Patriots quarterback Tom Brady signs autographs after the Patriots' joint NFL football practice with the New Orleans Saints in Foxborough, Mass., Tuesday, Aug. 7, 2012. (AP Photo/Stephan Savoia)

Dallas Cowboys linebacker Bruce Carter, center right, attempts to tackle running back DeMarco Murray, center left, during NFL football training camp, Wednesday, Aug. 1, 2012, in Oxnard, Calif. (AP Photo/Gus Ruelas)

Tennessee Titans receiver Nate Washington (85) makes a catch during NFL football camp at Titans' headquarters Sunday, July 29, 2012 Nashville, Tenn. (AP Photo/Wade Payne)

Minnesota Vikings defensive end Nick Reed (66) douses his head with water during practice at NFL football training camp, Monday, July 30, 2012, in Mankato, Minn. (AP Photo/Genevieve Ross)

Indianapolis Colts quarterback Andrew Luck throws during the NFL team's football training camp in Anderson, Ind., Monday, Aug. 6, 2012. (AP Photo/Michael Conroy)

Washington Redskins quarterback Rex Grossman, left, drops back to pass at the team's NFL football training camp practice at Redskins Park, Tuesday, Aug. 7, 2012, in Ashburn, Va. (AP Photo/Alex Brandon)

Cincinnati Bengals wide receiver Brandon Tate catches a pass for a first down during the NFL team's football practice, Tuesday, Aug. 7, 2012, at training camp in Cincinnati. (AP Photo/Al Behrman)

Washington Redskins defensive tackle Jarvis Jenkins hits a dummy during NFL football training camp at Redskins Park, Friday, Aug. 3, 2012, in Ashburn, Va. (AP Photo/Alex Brandon)

St. Louis Rams center T. Bob Hebert (60), center Robert Turner (59), tackle Jose Valdez (65) and other members of the offensive line turn a sled around during NFL football training camp, Tuesday, July 31, 2012, at the team's training facility in St. Louis. (AP Photo/Tom Gannam)

Spectators sit on a grass berm as they watch Seattle Seahawks NFL football training camp, Friday, Aug. 3, 2012, in Renton, Wash. (AP Photo/Ted S. Warren)

Carolina Panthers' Cam Newton throws a pass during practice at NFL football training camp in Spartanburg, S.C., Thursday, Aug. 2, 2012. (AP Photo/Chuck Burton)

San Francisco 49ers quarterback Alex Smith practices during an NFL football training camp in Santa Clara, Calif., Thursday, Aug. 2, 2012. (AP Photo/Jeff Chiu)

San Diego Chargers wide receiver Roscoe Parrish gets finger tip control while catching a pass during practice at the Chargers' training camp Tuesday, July 31, 2012 in San Diego. (AP Photo/Lenny Ignelzi)

New Orleans Saints running back Chris Ivory (29) is wrapped up by several defenders during NFL football training camp in Metairie, La., Wednesday, Aug. 1, 2012. (AP Photo/Gerald Herbert)

Dallas Cowboys running back Phillip Tanner, left, runs a drill during NFL football training camp, Tuesday, July 31, 2012, in Oxnard, Calif. (AP Photo/Gus Ruelas)

Pittsburgh Steelers offensive guard David DeCastro (66) hits a blocking sled in drill during practice at the NFL football training camp in Latrobe, Pa. on Tuesday, July 31, 2012 . (AP Photo/Keith Srakocic)

Cincinnati Bengals wide receiver Jordan Shipley catches a pass during the NFL team's football practice, Tuesday, July 31, 2012, at training camp in Cincinnati. Shipley was cleared for practice this week after missing most of last season with a knee injury. (AP Photo/Al Behrman)

Atlanta Falcons quarterback Matt Ryan talks to reporters during NFL football training camp, Monday, July 30, 2012, in Flowery Branch, Ga. (AP Photo/John Amis)

Houston Texans' Lestar Jean catches a pass during drills at training camp Monday, July 30, 2012, in Houston. (AP Photo/Pat Sullivan)

Cleveland Browns running back Montario Hardesty runs between defensive end Emmanuel Stephens, right, and linebacker L.J. Fort, left, during an NFL football training camp in Berea, Ohio Monday July 30, 2012. (AP Photo/Ron Schwane)

Cincinnati Bengals wide receiver Marvin Jones catches a pass against cornerback Chris Lewis-Harris (37) during the NFL team's football practice, Tuesday, July 31, 2012, in Cincinnati. (AP Photo/Al Behrman)

New York Jets Isaiah Trufant , right, attempts to stop running back Bilal Powell during practice at their NFL football training camp Monday, July 30, 2012, in Cortland, N.Y. (AP Photo/Bill Kostroun)

Seattle Seahawks' linebacker LeRoy Hill center, takes part in a blocking drill, Monday, July 30, 2012, at NFL football training camp in Renton, Wash. (AP Photo/Ted S. Warren)

St. Louis Rams quarterback Sam Bradford (8) passes the ball during a drill at NFL football training camp, Monday, July 30, 2012, at the team's training facility in St. Louis. (AP Photo/Tom Gannam)

Minnesota Vikings wide receiver Jerome Simpson runs with the ball after making a catch as Vikings corner back Marcus Sherels, left, defends during practice at NFL football training camp, Monday, July 30, 2012, in Mankato, Minn. At back right is Vikings linebacker Solomon Elimimian (59). (AP Photo/Genevieve Ross)

Carolina Panthers quarterback Cam Newton throws a pass during practice at the NFL team's football training camp in Spartanburg, S.C., Monday, July 30, 2012. (AP Photo/Chuck Burton)

Young fans wait with their bikes to see if a Green Bay Packers player will pick theirs to ride after practice at NFL football training camp, Tuesday, July 31, 2012, in Green Bay, Wis. (AP Photo/Mike Roemer)

Detroit Lions running back Joique Bell runs drills during NFL football training camp in Allen Park, Mich. Monday, July 30, 2012. (AP Photo/Carlos Osorio)

Chicago Bears cornerback Isaiah Frey (31) tackles running back Lorenzo Booker (38) during NFL football training camp at Olivet Nazarene University in Bourbonnais, Ill., Sunday, July 29, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears defensive end Julius Peppers (90) throws a ball during NFL football training camp at Olivet Nazarene University in Bourbonnais, Ill., Sunday, July 29, 2012. (AP Photo/Nam Y. Huh)

New York Giants wide receiver Victor Cruz catches a pass from quarterback Eli Manning during a workout at NFL football training camp in Albany, N.Y., Sunday, July 29, 2012. Coming off a record-setting season for the Super Bowl champion New York Giants, Cruz isn't on "Cruz" control. (AP Photo/Kathy Willens)

New York Jets running back Shonn Greene runs with the ball at NFL football training camp on Sunday, July 29, 2012, in Cortland, N.Y. (AP Photo/Bill Kostroun)

Cleveland Browns wide receiver Owen Spencer runs through drills during NFL football training camp on Sunday, July 29, 2012, in Berea, Ohio. (AP Photo/Tony Dejak)

Tampa Bay Buccaneers offensive lineman Frank Okam cools off during a water break during a workout at NFL football training camp, Saturday, July 28, 2012, in Tampa, Fla. (AP Photo/Mike Carlson)

Houston Texans' Owen Daniels makes a catch on the first day of NFL football training camp Saturday, July 28, 2012, in Houston. (AP Photo/Pat Sullivan)

Chicago Bears wide receiver Brandon Marshall (15) catches a ball during NFL football training camp at Olivet Nazarene University in Bourbonnais, Ill., Friday, July 27, 2012. (AP Photo/Nam Y. Huh)

New England Patriots' Tom Brady (12) passes as Aaron Hernandez, left, Ryan Mallett (15) and Brian Hoyer (8) look on during NFL football training camp in Foxborough, Mass., Saturday, July 28, 2012. (AP Photo/Michael Dwyer)

Cleveland Browns wide receiver Greg Little makes a leaping catch during NFL football training camp in Berea, Ohio, Saturday, July 28, 2012. (AP Photo/David Richard)

Tampa Bay Buccaneers offensive linemen Derek Hardman, left, and Davin Joseph participate in a blocking drill during a workout at NFL football training camp, Saturday, July 28, 2012, in Tampa, Fla. (AP Photo/Mike Carlson)

New York Jets quarterback Mark Sanchez throws a pass at their NFL football training camp Saturday, July 28, 2012, in Cortland, N.Y. (AP Photo/Bill Kostroun)

Chicago Bears quarterbacks Jay Cutler (6), Jason Campbell (2) and Josh McCown (12) ride a golf cart during NFL football training camp at Olivet Nazarene University in Bourbonnais, Ill., Thursday, July 26, 2012. (AP Photo/Nam Y. Huh)

Philadelphia Eagles running back LeSean McCoy (25) runs a drill during NFL football training camp at Lehigh University in Bethlehem, Pa., Thursday, July 26, 2012. (AP Photo/Rich Schultz)

Indianapolis Colts wide receiver Reggie Wayne, center, escorted by members of the 38th Aviation Brigade Recruiting Command, "reports for duty" as players arrive at the NFL team's football training camp in Anderson, Ind., Saturday, July 28, 2012. Practice begins Sunday. (AP Photo/Michael Conroy)

New Orleans Saints quarterback Drew Brees (9) works out during the first practice of NFL football training camp at their indoor training facility in Metairie, La., Thursday, July 26, 2012. (AP Photo/Gerald Herbert)

Arizona Cardinals' Gino Crump, front, makes a catch as Larry Parker (41) defends during NFL training camp football practice at Northern Arizona University Friday, July 27, 2012, in Flagstaff, Ariz.(AP Photo/Ross D. Franklin)

Chicago Bears players practice during NFL football training camp at Olivet Nazarene University in Bourbonnais, Ill., Friday, July 27, 2012. (AP Photo/Nam Y. Huh)

Pittsburgh Steelers wide receiver Antonio Brown makes a catch during practice at NFL football training camp in Latrobe, Pa., Friday, July 27, 2012. (AP Photo/Keith Srakocic)

Kids line up for autographs in Superman caped knee high socks, just like the ones worn by Washington Redskins quarterback Robert Griffin III when he won the Heisman trophy, during an NFL football training camp at Redskins Park, Friday, July 27, 2012, in Ashburn, Va. (AP Photo/Carolyn Kaster)

San Francisco 49ers wide receiver Mario Manningham catches a pass during NFL football training camp in Santa Clara, Calif., Friday, July 27, 2012. (AP Photo/Paul Sakuma)

Buffalo Bills' Dwan Edwards works out during NFL football training camp in Pittsford, N.Y., Friday, July 27, 2012. (AP Photo/David Duprey)

Buffalo Bills' Mario Williams (94) runs a drill during NFL football training camp in Pittsford, N.Y., Friday, July 27, 2012. (AP Photo/David Duprey)

Miami Dolphins' Clyde Gates, rear, and Vincent Agnew practice during NFL football training camp in Davie, Fla., Friday, July 27, 2012. (AP Photo/Alan Diaz)

Jacksonville Jaguars running back DuJuan Harris, right, makes a move to get past defensive back Reggie Corner (37) during a practice at NFL football training camp on Friday, July 27, 2012, in Jacksonville, Fla. (AP Photo/John Raoux)

Washington Redskins quarterback Robert Griffin III signs autographs during an NFL football training camp at Redskins Park, Friday, July 27, 2012, in Ashburn, Va. (AP Photo/Carolyn Kaster)

Cincinnati Bengals quarterback Andy Dalton passes during the NFL football team's first practice at training camp, Friday, July 27, 2012, in Cincinnati. (AP Photo/Al Behrman)

Green Bay Packers offensive tackle Ray Dominguez (73) carries a young girls bike as she carries his helmet before NFL football training camp Thursday, July. 26, 2012, in Green Bay, Wis. (AP Photo/Mike Roemer)

The Detroit Lions run on the indoor practice field at the NFL football team's training facility in Allen Park, Mich., Friday, July 27, 2012. (AP Photo/Carlos Osorio)

New Orleans Saints running back Chris Ivory (29) eludes defensive tackle Remi Ayodele (92) and linebacker Will Herring (54) during NFL football training camp at their training facility in Metairie, La., Thursday, July 26, 2012. (AP Photo/Gerald Herbert)

Buffalo Bills' Ryan Fitzpatrick (14) runs a drill with teammates during NFL football training camp in Pittsford, N.Y., Thursday, July 26, 2012. (AP Photo/David Duprey)

Green Bay Packers defensive back Charles Woodson (21) catches a ball during NFL football training camp Thursday, July. 26, 2012, in Green Bay, Wis. (AP Photo/Mike Roemer)

Buffalo Bills' Fred Jackson, front, makes a catch under pressure from Scott McKillop during NFL football training camp in Pittsford, N.Y., Thursday, July 26, 2012. (AP Photo/David Duprey)

New England Patriots wide receiver Deion Branch (84) pulls in a pass reception during practice on the first day of training camp at the NFL football team's facility in Foxborough, Mass., Thursday, July 26, 2012. (AP Photo/Stephan Savoia)

Atlanta Falcons' Dimitri Nance makes a catch during NFL football training camp in Flowery Branch, Ga., Thursday, July 26, 2012. (AP Photo/John Bazemore)

New York Giants cornerback Jayron Hosley takes a drink after running on the field during a physical evaluation drill on opening day of NFL football training camp in Albany, N.Y., Thursday, July 26, 2012. (AP Photo/Kathy Willens)

Washington Redskins quarterback Robert Griffin III drops back to throw a pass during NFL football training camp at Redskins Park, Thursday, July 26, 2012, in Ashburn, Va. (AP Photo/Carolyn Kaster)

Denver Broncos running back Rahim Moore jumps rope following the opening session of Denver Broncos NFL football training camp in Englewood, Colo., Thursday, July 26, 2012. (AP Photo/Jack Dempsey)

Baltimore Ravens' Ed Reed warms up during NFL football training camp Thursday, July 26, 2012, in Owings Mills, Md. (AP Photo/Gail Burton)

San Diego Chargers running back Michael Hayes pulls in a pass during NFL football practice at the team's training camp, Tuesday, July 24, 2012 in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers defensive end Kendall Reyes jumps while performing drills during NFL football practice at the team's training camp, Monday, July 23, 2012, in San Diego. (AP Photo/Lenny Ignelzi)

Pittsburgh Steelers defensive lineman Brett Keisel hops down from a tractor as he drove on campus for his arrival for NFL football training camp at the team' training facility in Latrobe, Pa., on Wednesday, July 25, 2012 . (AP Photo/Keith Srakocic)

From left to right, Arizona Cardinals quarterbacks John Skelton, Ryan Lindley, Kevin Kolb, and Richard Bartel drop back to throw passes during the first day of NFL training camp football practice at Northern Arizona University, Wednesday, July 25, 2012, in Flagstaff, Ariz. (AP Photo/Ross D. Franklin)

Arizona Cardinals' Larry Fitzgerald (11) gets some help driving his Segway from his son, Devin Fitzgerald, after the first day of NFL training camp football practice at Northern Arizona University, Wednesday, July 25, 2012, in Flagstaff, Ariz. (AP Photo/Ross D. Franklin)

Storm clouds move in over the first day of the Arizona Cardinals' NFL football training camp at Northern Arizona University, Wednesday, July 25, 2012, in Flagstaff, Ariz. (AP Photo/Ross D. Franklin)

Arizona Cardinals' Ryan Williams (34) gets past Jeremy Bridges (73) during running drills on the first day of practice during the NFL football team's training camp at Northern Arizona University, Wednesday, July 25, 2012, in Flagstaff, Ariz. (AP Photo/Ross D. Franklin)

Washington Redskins quarterback Robert Griffin III walks to a morning practice at NFL football training camp at Redskins Park, Thursday, July 26, 2012, in Ashburn, Va. (AP Photo/Carolyn Kaster)

Tennessee Titans running back Nate Washington (85) and Chris Johnson (28) warm up during training camp at Titans' headquarters Saturday, July 28, 2012 Nashville, Tenn. (AP Photo/Wade Payne)

Cleveland Browns defensive back James Dockery, front, intercepts the ball from Browns wide receiver Travis Benjamin during NFL football training camp Sunday, July 29, 2012, in Berea, Ohio. (AP Photo/Tony Dejak)

Cleveland Browns linebacker Ben Jacobs, left, stops running back Brandon Jackson during NFL football training camp Sunday, July 29, 2012, in Berea, Ohio. (AP Photo/Tony Dejak)

Miami Dolphins' Reggie Bush practices during NFL football training camp in Davie, Fla., Sunday, July 29, 2012. (AP Photo/Terry Renna)

Houston Texans' Jerrell Jackson (89) makes a catch while followed by Brandon Harris (26) at NFL football training camp on Sunday, July 29, 2012, in Houston. (AP Photo/Pat Sullivan)

Cleveland Browns quarterback Brandon Weeden signs autographs for fans after NFL football training camp on Sunday, July 29, 2012, in Berea, Ohio. (AP Photo/Tony Dejak)

Houston Texans' Duane Brown cools off during NFL football training camp on Sunday, July 29, 2012, in Houston. (AP Photo/Pat Sullivan)

Cleveland Browns running back Brandon Jackson runs drills during NFL football training camp on Sunday, July 29, 2012, in Berea, Ohio. (AP Photo/Tony Dejak)

Carolina Panthers players meet on the field before practice at the NFL team's football training camp in Spartanburg, S.C., Sunday, July 29, 2012. (AP Photo/Chuck Burton)

New York Giants wide receiver Victor Cruz (80) braces to return a kick during NFL football training camp in Albany, N.Y., Sunday, July 29, 2012. Coming off a record-setting season for the Super Bowl champion Giants, Cruz isn't on "Cruz" control. (AP Photo/Kathy Willens)

New England Patriots wide receiver Wes Welker (83) makes a catch during a team NFL football training camp in Foxborough, Mass., Sunday, July 29, 2012. (AP Photo/Steven Senne)

Cincinnati Bengals tight end Jermaine Gresham (84) catches a long pass against linebacker Dan Skuta (51) during the NFL football team's practice, Sunday, July 29, 2012, at training camp in Cincinnati. (AP Photo/Al Behrman)

New York Giants wide receiver Ramses Barden signs autographs for fans after a workout at NFL football training camp in Albany, N.Y., Sunday, July 29, 2012. (AP Photo/Kathy Willens)

New Orleans Saints wide receiver Adrian Arrington (87) pulls in a pass over cornerback Patrick Robinson (21) during training camp at their NFL football training facility in Metairie, La., Sunday, July 29, 2012. (AP Photo/Gerald Herbert)

Pittsburgh Steelers wide receiver Toney Clemons (11) goes up for a pass over defensive back Terry Carter (35) during drills in practice at NFL football training camp in Latrobe, Pa., Sunday, July 29, 2012. (AP Photo/Keith Srakocic)

Chicago Bears wide receiver Brandon Marshall, top, catches a ball against cornerback Charles Tillman (33) during NFL football training camp at Olivet Nazarene University in Bourbonnais, Ill., Sunday, July 29, 2012. (AP Photo/Nam Y. Huh)

Washington Redskins quarterback Robert Griffin III greets fans after NFL football training camp at Redskins Park, Monday, July 30, 2012, in Ashburn, Va. (AP Photo/Evan Vucci)

St. Louis Rams wide receiver Danny Amendola (16) looks to catch the ball as he is defended by defensive back Cortland Finnegan (31) during NFL football training camp, Monday, July 30, 2012 at the the team's training facility in St. Louis.(AP Photo/Tom Gannam)