Houston Texans wide receiver Andre Johnson, right, talks with Atlanta Falcons wide receiver Roddy White (84) during an NFL football training camp practice Wednesday, Aug. 13, 2014, in Houston.The Falcons are practicing with the Texans this week before their preseason game Saturday. (AP Photo/David J. Phillip)

Seattle Seahawks assistant offensive line coach Pat Ruel, center, walks off the field with tackle Garry Gilliam, left, and guard Nate Isles, right, on the final day of NFL football training camp, Wednesday, Aug. 13, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

Seattle Seahawks wide receiver Percy Harvin, right, walks with his son Jaden, 1, on the field following the final day of NFL football training camp, Wednesday, Aug. 13, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

Seattle Seahawks wide receiver Percy Harvin, right, laughs as his son Jaden, 1, second from right, interacts with Kaydence Miller, 1, the daughter of Seahawks tight end Zach Miller, left, following the final day of NFL football training camp, Wednesday, Aug. 13, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

Seattle Seahawks quarterback Russell Wilson (3) looks to pass as his backups look on, during the final day of NFL football training camp, Wednesday, Aug. 13, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

Houston Texans defensive end J.J. Watt, left, signs autographs for fans after an NFL football training camp practice Wednesday, Aug. 13, 2014, in Houston. (AP Photo/David J. Phillip)

Atlanta Falcons' Kemal Ishmael (36) and Houston Texans' A.J. Bouye (34) walk off the field together after an NFL football training camp practice Wednesday, Aug. 13, 2014, in Houston. The Falcons are practicing with the Texans this week before their preseason game Saturday. (AP Photo/David J. Phillip)

Houston Texans running back Alfred Blue, right, is wrapped up by the Atlanta Falcons defense including free safety Dwight Lowery (20) during an NFL football training camp practice Wednesday, Aug. 13, 2014, in Houston. The Falcons are practicing with the Houston Texans this week before their preseason game Saturday. (AP Photo/David J. Phillip)

New England Patriots quarterback Tom Brady, right, and Philadelphia Eagles running back LeSean McCoy (25) chat after a joint NFL football training camp practice in Foxborough, Mass., Wednesday, Aug. 13, 2014. (AP Photo/Elise Amendola)

New England Patriots quarterback Tom Brady, left, catches a football as he leads Ryan Mallett (15) and others in a drill during an NFL football training camp joint practice of the New England Patriots and the Philadelphia Eagles in Foxborough, Mass., Wednesday, Aug. 13, 2014. (AP Photo/Elise Amendola)

Philadelphia Eagles head coach Chip Kelly and New England Patriots tight end Rob Gronkowski (87) chat as they leave a joint NFL football training camp practice in Foxborough, Mass., Wednesday, Aug. 13, 2014. (AP Photo/Elise Amendola)

Houston Texans wide receiver DeAndre Hopkins (10) catches a pass with one hand during an NFL training camp practice Wednesday, Aug. 13, 2014, in Houston. (AP Photo/David J. Phillip)

Denver Broncos head coach John Fox talks with his team during NFL football training camp on Tuesday, Aug 12, 2014, in Englewood, Colo. (AP Photo/Jack Dempsey)

Denver Broncos' Kenny Anunike has his wrists taped during NFL football training camp on Tuesday, Aug 12, 2014, in Englewood, Colo. (AP Photo/Jack Dempsey)

Denver Broncos' Peyton Manning smiles while stretching during NFL football training camp on Tuesday, Aug 12, 2014, in Englewood, Colo. (AP Photo/Jack Dempsey)

Denver Broncos' DeMarcus Ware runs a drill during NFL football training camp on Tuesday, Aug 12, 2014, in Englewood, Colo. (AP Photo/Jack Dempsey)

Cleveland Browns quarterback Johnny Manziel passes during practice at NFL football training camp in Berea, Ohio Tuesday, Aug. 12, 2014. (AP Photo/Mark Duncan)

Cleveland Browns quarterback Brian Hoyer (6) passes during practice at NFL football training camp in Berea, Ohio Tuesday, Aug. 12, 2014. (AP Photo/Mark Duncan)

Cleveland Browns running back Ben Tate runs the ball during practice at NFL football training camp in Berea, Ohio Tuesday, Aug. 12, 2014. (AP Photo/Mark Duncan)

Cleveland Browns tight end Jordan Cameron catches a pass during practice at NFL football training camp in Berea, Ohio Tuesday, Aug. 12, 2014. (AP Photo/Mark Duncan)

Cleveland Browns defensive back Donte Whitner knocks away a pass intended for wide receiver Andrew Hawkins during practice at NFL football training camp in Berea, Ohio Tuesday, Aug. 12, 2014. (AP Photo/Mark Duncan)

Cleveland Browns head coach Mike Pettine yells at his players during practice at NFL football training camp in Berea, Ohio Tuesday, Aug. 12, 2014. (AP Photo/Mark Duncan)

Denver Broncos' Danny Trevathan runs a drill during NFL football training camp on Tuesday, Aug 12, 2014, in Englewood, Colo. Trevathan was injured later in practice. (AP Photo/Jack Dempsey)

Denver Broncos' Danny Trevathan runs a drill against Lerentee McCray (55) during NFL football training camp on Tuesday, Aug 12, 2014, in Englewood, Colo. Trevathan was injured later in practice. (AP Photo/Jack Dempsey)

Indianapolis Colts head coach Chuck Pagano talks to his team during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

Indianapolis Colts quarterback Andrew Luck gives instructions during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

Indianapolis Colts wide receiver Hakeem Nicks makes a catch during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

Indianapolis Colts quarterback Chandler Harnish throw during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

Indianapolis Colts wide receiver Reggie Wayne (87) makes a catch during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

Indianapolis Colts running back Trent Richardson (34) runs past defensive end Cory Redding (90) during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

Indianapolis Colts tight end Coby Fleener makes a catch against cornerback Loucheiz Purifoy during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

Indianapolis Colts wide receiver Griff Whalen (17) makes a catch against cornerback Greg Toler during NFL football training camp Tuesday, Aug. 12, 2014, in Anderson, Ind. (AP Photo/Darron Cummings)

New England Patriots NFL team members including James White (28) run during a joint training camp with the Washington Redskins in Richmond, Va., Wednesday, Aug. 6, 2014. (AP Photo/Jay Paul)

New England Patriots NFL team quarterback Tom Brady (12) runs during a joint training camp with the Washington Redskins in Richmond, Va., Wednesday, Aug. 6, 2014. (AP Photo/Jay Paul)

Washington Redskins NFL football team quarterback Robert Griffin III signs autographs after practice in Richmond, Va., Wednesday, Aug. 6, 2014. (AP Photo/Jay Paul)

Washington Redskins NFL football team quarterback Robert Griffin III (10) takes a photo with, from left foreground, Lataya Stanley, Jamie Bowser. Angeline Mahoney and Brenda McFarland of the U.S. Air Force, after a joint practice with the New England Patriots in Richmond, Va., Wednesday, Aug. 6, 2014. (AP Photo/Jay Paul)

New Orleans Saints tight end Josh Hill (89) catches the ball in a passing drill during the teams NFL football training camp in White Sulphur Springs, W.Va., Tuesday, Aug. 5, 2014. (AP Photo/Chris Tilley)

Seattle Seahawks wide receiver Chris Matthews, left, comes down with a catch as cornerback A.J. Jefferson (32) looks on, during a session of NFL football training camp, Tuesday, Aug. 5, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

Detroit Lions cornerback Mohammed Selsay, right, closes in on wide receiver Ryan Broyles, left, during an NFL football training camp in Allen Park, Mich., Tuesday, Aug. 5, 2014. (AP Photo/Carlos Osorio)

Tampa Bay Buccaneers running back Bobby Rainey (43) pushes past linebacker Nate Askew (53) during NFL football training camp Tuesday, Aug. 5, 2014, in Tampa, Fla. (AP Photo/Chris O'Meara)

In this July 31, 2014 photo Carolina Panthers' Luke Kuechly (59), Thomas Davis (58), and A.J. Klein (56) run a play during an NFL football practice at their training camp in Spartanburg, S.C. Davis has battled back from three separate torn ACLs in the same knee but is still performing at a high level. But not high enough for Davis.(AP Photo/Chuck Burton)

Seattle Seahawks wide receiver Percy Harvin makes a catch during NFL football training camp, Tuesday, Aug. 5, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

New England Patriot DB Nate Ebner (43) engages Washington Redskins LB Darryl Sharpton during an NFL Football training camp scrimmage of New England Patriots and Washington Redskins in Richmond, Va., Tuesday, Aug. 5, 2014. (AP Photo/Skip Rowland)

Detroit Lions defensive ends George Johnson (68) and Larry Webster (79) run through drills during an NFL football training camp in Allen Park, Mich., Tuesday, Aug. 5, 2014. (AP Photo/Carlos Osorio)

Seattle Seahawks running back Marshawn Lynch, right, squares off in a joking manner with Seahawks defensive coordinator Dan Quinn as Quinn wears blocking pads during a session of NFL football training camp, Tuesday, Aug. 5, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

Seattle Seahawks quarterback Russell Wilson passes during a session of NFL football training camp, Tuesday, Aug. 5, 2014, in Renton, Wash. (AP Photo/Ted S. Warren)

Tampa Bay Buccaneers wide receiver Robert Herron makes a catch as offensive coordinator Jeff Tedford, left, stands near during an NFL football training camp Tuesday, Aug. 5, 2014, in Tampa, Fla. (AP Photo/Chris O'Meara)

Tampa Bay Buccaneers quarterback Josh McCown (12) throws a pass during an NFL football training camp Tuesday, Aug. 5, 2014, in Tampa, Fla. (AP Photo/Chris O'Meara)

San Diego Chargers tight end John Phillips, left, does battle with linebacker Colton Underwood during practice at a NFL football training camp Monday, Aug. 4, 2014, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers wide receiver Keenan Allen, the teams' top receiver last season, drops a pass during practice at a NFL football training camp Monday, Aug. 4, 2014, in San Diego. (AP Photo/Lenny Ignelzi)

San Diego Chargers quarterback Philip Rivers wipes away the sweat from unseasonably warm weather during practice at a NFL football training camp Monday, Aug. 4, 2014, in San Diego. (AP Photo/Lenny Ignelzi)

Pittsburgh Steelers center Cody Wallace (72) blocks linebacker Sean Spence (51) during NFL football training camp in Latrobe, Pa., on Monday, Aug. 4, 2014 . (AP Photo/Keith Srakocic)

Pittsburgh Steelers defensive back Antwon Blake (41) recovers a fumble after tight end Eric Waters (80) lost the ball during NFL football training camp in Latrobe, Pa., on Monday, Aug. 4, 2014 . (AP Photo/Keith Srakocic)

Pittsburgh Steelers free safety Mike Mitchell (23) defends on wide receiver Antonio Brown (84) during NFL football training camp in Latrobe, Pa., on Monday, Aug. 4, 2014 . (AP Photo/Keith Srakocic)

Pittsburgh Steelers cornerback Ike Taylor (24) uses a towel for a hat during NFL football training camp in Latrobe, Pa., on Monday, Aug. 4, 2014 . (AP Photo/Keith Srakocic)

Pittsburgh Steelers wide receiver Martavis Bryant (10) stretches for a pass during NFL football training camp in Latrobe, Pa., on Monday, Aug. 4, 2014 . (AP Photo/Keith Srakocic)

New Orleans Saints cornerback Keenan Lewis (28) catches the ball during a drill at the team's NFL football training camp in White Sulphur Springs, W. Va., Monday, Aug. 4, 2014. (AP Photo/Chris Tilley)

New Orleans Saints defensive back Ty Zimmerman (49) catches the ball during a drill at teams NFL football training camp in White Sulphur Springs, W. Va., Monday, Aug. 4, 2014. (AP Photo/Chris Tilley)

New Orleans Saints running back Derrick Strozier (48) runs the ball during the team's NFL football training camp in White Sulphur Springs, W. Va., Monday, Aug. 4, 2014. (AP Photo/Chris Tilley)

New Orleans Saints wide receiver Joe Morgan (13) catches a punt during the team's NFL football training camp in White Sulphur Springs, W. Va., Monday, Aug. 4, 2014. (AP Photo/Chris Tilley)

Tampa Bay Buccaneers wide receiver Solomon Patton (86) grabs the ball over cornerback Kip Edwards (39) during an NFL football training camp Monday, Aug. 4, 2014, in Tampa, Fla. (AP Photo/Chris O'Meara)

Tampa Bay Buccaneers wide receiver Chris Owusu, right, loses the football after getting hit by cornerback D.J. Moore during an NFL football training camp Monday, Aug. 4, 2014, in Tampa, Fla. (AP Photo/Chris O'Meara)

Kansas City Chiefs head coach Andy Reid watches while quarterback Chase Daniel (10) passes during NFL football training camp Monday, Aug. 4, 2014, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

Kansas City Chiefs running back Knile Davis (34) participates in a drill during NFL football training camp Monday, Aug. 4, 2014, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

Kansas City Chiefs defensive back Husain Abdullah (39) plays with his son Jalaal, 7, after NFL football training camp Monday, Aug. 4, 2014, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

Kansas City Chiefs running back De'Anthony Thomas (1) sighs autographs after NFL football training camp Monday, Aug. 4, 2014, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

Washington Redskins NFL football quarterbacks Kirk Cousins (8) and Colt McCoy (16) throw passes during practice Monday, Aug. 4, 2014, in Richmond, Va. (AP Photo/Jay Paul)

Washington Redskins NFL football linebacker Akeem Jordan (54) catches a pass during practice Monday, Aug. 4, 2014, in Richmond, Va. (AP Photo/Jay Paul)

Washington Redskins NFL football wide receiver Pierre Garcon (88) runs with coach Jake Peetz during practice Monday, Aug. 4, 2014, in Richmond, Va. (AP Photo/Jay Paul)

Philadelphia Eagles running back LeSean McCoy runs a drill during NFL football training camp Monday, Aug. 4, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Philadelphia Eagles defensive coordinator Bill Davis, left, meets with head coach Chip Kelly NFL during football training camp Monday, Aug. 4, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Miami Dolphins strong safety Don Jones (36) catches a pass during NFL football training camp in Davie, Fla., Monday,Aug. 4, 2014. (AP Photo/Alan Diaz)

Philadelphia Eagles free safety Malcolm Jenkins catches a pass during NFL football training camp Monday, Aug. 4, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Cleveland Browns wide receiver Josh Gordon (12) talks with teammates Andrew Hawkins (16) and Nate Burleson (13) during practice at the NFL football team's training camp Monday, Aug. 4, 2014, in Berea, Ohio. (AP Photo/Tony Dejak)

Miami Dolphins quarterback Ryan Tannehill, second from left, warms up during NFL football training camp in Davie, Fla., Monday, Aug. 4, 2014. (AP Photo/Alan Diaz)

Miami Dolphins wide receiver Kevin Cone (15) tries to tackle cornerback Walt Aikens, foreground, after Aikens intercepted a pass intended for Cone during NFL football training camp in Davie, Fla., Monday, Aug. 4, 2014. (AP Photo/Alan Diaz)

Washington Redskins NFL football quarterbacks Robert Griffin III (10) and Kirk Cousins (8) throw passes during practice Monday, Aug. 4, 2014, in Richmond, Va. (AP Photo/Jay Paul)

Fans watch a New England Patriots and Washington Redskins joint NFL football practice in Richmond, Va., Monday, Aug. 4, 2014. (AP Photo/Jay Paul)

Miami Dolphins cornerback Cortland Finnegan (24) smiles as he prepares to catch a pass during NFL football training camp in Davie, Fla., Monday,Aug. 4, 2014. (AP Photo/Alan Diaz)

Philadelphia Eagles quarterbacks from right, Nick Foles, Mark Sanchez, Matt Barkley, and G.J. Kinne throws a passes during NFL football training camp Monday, Aug. 4, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Miami Dolphins wide receiver Mike Wallace (11) catches a pass during NFL football training camp in Davie, Fla., Monday, Aug. 4, 2014. (AP Photo/Alan Diaz)

St. Louis Rams defensive end Robert Quinn, right, and Eugene Sims take part in a drill during NFL football training camp at Edward Jones Dome Saturday, Aug. 2, 2014, in St. Louis. (AP Photo/Jeff Roberson)

Minnesota Vikings wide receiver Cordarrelle Patterson walks to the field before an NFL football training camp practice, Saturday, Aug. 2, 2014, in Mankato, Minn. (AP Photo/Charlie Neibergall)

Cincinnati Bengals cornerback Chris Lewis-Harris, right, breaks up a pass intended for Cincinnati Bengals wide receiver A.J. Green during practice at the NFL football team's training camp, Friday, Aug. 1, 2014, in Cincinnati. (AP Photo/Al Behrman)

Cincinnati Bengals head coach Marvin Lewis passes a ball during practice at the NFL football team's training camp, Friday, Aug. 1, 2014, in Cincinnati. (AP Photo/Al Behrman)

Philadelphia Eagles wide receiver Riley Cooper catches a pass during NFL football training camp Friday, Aug. 1, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Seattle Seahawks running back Marshawn Lynch stands on the field during NFL Football training camp, Friday, Aug. 1, 2014, in Renton, Wash. Friday was Lynch's first day attending training camp after staying away due to contract issues. (AP Photo/Ted S. Warren)

Carolina Panthers' Melvin White (23) catches a ball during an NFL football practice at their training camp in Spartanburg, S.C., Friday, Aug. 1, 2014. (AP Photo/Chuck Burton)

Carolina Panthers' Cam Newton, left, jokes with line judge Carl Johnson, right, during an NFL football practice at their training camp in Spartanburg, S.C., Friday, Aug. 1, 2014. (AP Photo/Chuck Burton)

Kansas City Chiefs running back Jamaal Charles (25) watches a drill during NFL football training camp Friday, Aug. 1, 2014, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

Kansas City Chiefs running back De'Anthony Thomas (1) catches a pass under pressure from cornerback Phillip Gaines (23) during NFL football training camp Friday, Aug. 1, 2014, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

Kansas City Chiefs quarterback Alex Smith (11) passes during NFL football training camp Friday, Aug. 1, 2014, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

Philadelphia Eagles running back LeSean McCoy runs a drill during NFL football training camp Friday, Aug. 1, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Philadelphia Eagles quarterback Matt Barkley, left, G.J. Kinne, Mark Sanchez (3) run a drill during NFL football training camp Friday, Aug. 1, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Minnesota Vikings wide receiver Greg Jennings catches a pass during an NFL football training camp practice, Friday, Aug. 1, 2014, in Mankato, Minn. (AP Photo/Charlie Neibergall)

Minnesota Vikings tight end Kyle Rudolph catches a pass during an NFL football training camp practice, Friday, Aug. 1, 2014, in Mankato, Minn. (AP Photo/Charlie Neibergall)

Philadelphia Eagles quarterback Nick Foles (9) runs a drill with running back LeSean McCoy (25) during NFL football training camp Friday, Aug. 1, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Minnesota Vikings quarterbacks, from left, Teddy Bridgewater, Matt Cassel and Christian Ponder walk to the field before an NFL football training camp practice, Friday, Aug. 1, 2014, in Mankato, Minn. (AP Photo/Charlie Neibergall)

Minnesota Vikings wide receivers, from left, Cordarrelle Patterson, Kamar Jorden and Greg Jennings look on during an NFL football training camp practice, Friday, Aug. 1, 2014, in Mankato, Minn. (AP Photo/Charlie Neibergall)

Dallas Cowboys defensive end Martez Wilson (56) attempts to stop kick returner Joseph Randle (21) during NFL football training camp, Thursday, July 31, 2014, in Oxnard, Calif. (AP Photo/Ringo H.W. Chiu)

Dallas Cowboys quarterback Tony Romo (9) throws a pass during a morning practice at NFL football training camp, Thursday, July 31, 2014, in Oxnard, Calif. (AP Photo/Ringo H.W. Chiu)

Detroit Lions guard Rob Sims runs through drills during an NFL football training camp in Allen Park, Mich., Thursday, July 31, 2014. (AP Photo/Carlos Osorio)

Cincinnati Bengals running back Rex Burkhead (33) runs the ball during practice at the NFL football team's training camp, Thursday, July 31, 2014, in Cincinnati. (AP Photo/Al Behrman)

Cincinnati Bengals wide receiver Colin Lockett (15) has a ball go through his hands while being covered by cornerback R.J. Stanford (28) during practice at the NFL football team's training camp, Thursday, July 31, 2014, in Cincinnati. (AP Photo/Al Behrman)

Pittsburgh Steelers wide receiver Antonio Brown (84) drops the sixth football that he tried to catch while holding the first five he caught in a punt catching drill during NFL football training camp in Latrobe, Pa., on Thursday, July 31, 2014 . (AP Photo/Keith Srakocic)

Carolina Panthers' Star Lotulelei, left, is blocked by Amini Silatolu, right, during an NFL football practice at their training camp in Spartanburg, S.C., Thursday, July 31, 2014. (AP Photo/Chuck Burton)

Carolina Panthers quarterback Cam Newton looks to pass between defensive dummies during an NFL football practice at their training camp in Spartanburg, S.C., Thursday, July 31, 2014. (AP Photo/Chuck Burton)

Carolina Panthers' DeAngelo Williams (34) runs a drill during an NFL football practice at their training camp in Spartanburg, S.C., Thursday, July 31, 2014. (AP Photo/Chuck Burton)

Philadelphia Eagles tight end Emil Igwenagu catches a pass during NFL football training camp Thursday, July 31, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Carolina Panthers' Jerricho Cotchery (82) reaches for a pass during an NFL football practice at their training camp in Spartanburg, S.C., Thursday, July 31, 2014. (AP Photo/Chuck Burton)