New York Jets quarterback Christian Hackenberg, left, throws while Bryce Petty looks on during NFL football training camp in Florham Park, N.J., Tuesday, Aug. 8, 2017. (AP Photo/Seth Wenig)

New York Giants wide receiver Brandon Marshall works out during NFL football training camp, Tuesday, Aug. 8, 2017, in East Rutherford, N.J. (AP Photo/Julio Cortez)

New York Giants wide receiver Brandon Marshall, left, and running back Shane Vereen celebrate after Marshall caught a touchdown pass during a two-minute warning drill during NFL football training camp, Tuesday, Aug. 8, 2017, in East Rutherford, N.J. (AP Photo/Julio Cortez)

New York Giants tight end Matt LaCosse, right, makes a catch as outside linebacker Jonathan Casillas defends on the play during NFL football training camp, Tuesday, Aug. 8, 2017, in East Rutherford, N.J. (AP Photo/Julio Cortez)

Baltimore Ravens quarterback Ryan Mallett, left, and head coach John Harbaugh fist bump during an NFL football training camp practice in Owings Mills, Md., Tuesday, Aug. 8, 2017. (AP Photo/Patrick Semansky)

Philadelphia Eagles wide receiver Jordan Matthews catches a ball during an NFL football training camp in Philadelphia, Tuesday, Aug. 8, 2017. (AP Photo/Matt Rourke)

Miami Dolphins running back Jay Ajayi (23) does drills during an NFL football training camp, Tuesday, Aug. 8, 2017, in Davie, Fla. (AP Photo/Lynne Sladky)

Miami Dolphins quarterback Jay Cutler (6) talks with quarterback Matt Moore (8) during an NFL football training camp, Tuesday, Aug. 8, 2017, in Davie, Fla. (AP Photo/Lynne Sladky)

Indianapolis Colts wide receiver Marvin Bracy (2) makes a catch during practice at the NFL team's football training camp Tuesday, Aug. 8, 2017, in Indianapolis. (AP Photo/Darron Cummings)

Miami Dolphins quarterback Jay Cutler (6) throws a pass during an NFL football training camp, Tuesday, Aug. 8, 2017, in Davie, Fla. (AP Photo/Lynne Sladky)

Young Pittsburgh Steelers fans cheer wide receiver Antonio Brown (84) after he jumped onto the railing in the end zone after making a catch during an NFL training camp football practice, Sunday, Aug. 6, 2017, in Pittsburgh. (AP Photo/Keith Srakocic)

Tampa Bay Buccaneers wide receiver DeSean Jackson (1) grabs a pass route during an NFL football training camp practice Aug. 5, 2017 in Tampa, Fla. (Al Messerschmidt via AP)

Running back Melvin Gordon #28 during Los Angeles Chargers NFL football training camp on Monday, Aug. 7, 2017 in Costa Mesa, Calif. (Ric Tapia/NFL)

Baltimore Ravens wide receiver Jeremy Maclin prepares to catch a pass during an NFL football training camp practice in Owings Mills, Md., Monday, Aug. 7, 2017. (AP Photo/Patrick Semansky)

Seattle Seahawks defensive players run through a drill during NFL football training camp in Friday, Aug. 4, 2017, in Renton, Wash. (AP Photo/Elaine Thompson)

Seattle Seahawks' Michael Bennett greets fans as he heads to the practice field during NFL football training camp Friday, Aug. 4, 2017, in Renton, Wash. (AP Photo/Elaine Thompson)

Oakland Raiders quarterback Derek Carr drops back to throw during an NFL football training camp Friday, Aug. 4, 2017, in Napa, Calif. In the background at right is quarterback EJ Manuel. (AP Photo/Eric Risberg)

Oakland Raiders running back Marshawn Lynch, right, runs with long snapper Jon Condo, left, and kicker Sebastian Janikowski, center, during an NFL football training camp Friday, Aug. 4, 2017, in Napa, Calif. (AP Photo/Eric Risberg)

Seattle Seahawks' Russell Wilson (3) leads fellow quarterbacks Trevone Boykin (2) and Austin Davis through drills during an NFL football training camp Friday, Aug. 4, 2017, in Renton, Wash. (AP Photo/Elaine Thompson)

Philadelphia Eagles quarterback Carson Wentz runs a drill during an NFL football training camp in Philadelphia, Friday, Aug. 4, 2017. (AP Photo/Matt Rourke)

Philadelphia Eagles wide receiver Jordan Matthews catches a ball during an NFL football training camp in Philadelphia, Friday, Aug. 4, 2017. (AP Photo/Matt Rourke)

Cleveland Browns wide receiver Kenny Britt catches a pass during practice at the NFL football team's training camp facility, Wednesday, Aug. 2, 2017, in Berea, Ohio. (AP Photo/Tony Dejak)

Houston Texans quarterback Tom Savage (3) looks to pass during the Houston Texans training camp at the Greenbrier in White Sulphur Springs, West Virginia on August 2, 2017. (Matt Patterson via AP)

Miami Dolphins quarterback Ryan Tannehill, left, hands off to running back Kenyan Drake an NFL football training camp, Thursday, Aug. 3, 2017, at the Dolphins training facility in Davie, Fla. (AP Photo/Wilfredo Lee)

Miami Dolphins wide receiver Jarvis Landry stretches out during an NFL football training camp, Thursday, Aug. 3, 2017, at the Dolphins training facility in Davie, Fla. (AP Photo/Wilfredo Lee)

New England Patriots' Tom Brady, center left, signs autographs for fans at NFL football training camp, Thursday, Aug. 3, 2017, in Foxborough, Mass. Brady turned 40-years-old Thursday. (AP Photo/Steven Senne)

Carolina Panthers' Cam Newton (1) talks with Kelvin Benjamin (13) during practice at the NFL team's football training camp at Wofford College in Spartanburg, S.C., Thursday, Aug. 3, 2017. (AP Photo/Chuck Burton)

Carolina Panthers' Chris Manhertz (82) catches a pass as Ben Boulware (50) defends during practice at the NFL team's football training camp at Wofford College in Spartanburg, S.C., Thursday, Aug. 3, 2017. (AP Photo/Chuck Burton)

Carolina Panthers' Cam Newton, right, laughs as he drives fellow quarterback Joe Webb, back, in a golf cart after practice at the NFL team's football training camp at Wofford College in Spartanburg, S.C., Thursday, Aug. 3, 2017. (AP Photo/Chuck Burton)

New England Patriots quarterback Tom Brady passes the ball at NFL football training camp, Thursday, Aug. 3, 2017, in Foxborough, Mass. Brady turned 40-years-old Thursday. (AP Photo/Steven Senne)

New York Giants quarterback Eli Manning throws a pass during NFL football training camp, Thursday, Aug. 3, 2017, in East Rutherford, N.J. (AP Photo/Julio Cortez)

New England Patriots tight end Rob Gronkowski (87) makes a catch at NFL football training camp, Thursday, Aug. 3, 2017, in Foxborough, Mass. (AP Photo/Steven Senne)

Detroit Lions running back Ameer Abdullah (21) during training camp practice on Wednesday, Aug. 2, 2017 in Allen Park, Mich. (Detroit Lions via AP)

New York Giants wide receiver Odell Beckham (13) practices during NFL football training camp on August 2, 2017 in East Rutherford, N.J. (Evan Pinkus via AP)

Houston Texans defensive end Christian Covington (95) deflects the ball during practice at the Houston Texans training camp at the Greenbrier in White Sulphur Springs, West Virginia on August 2, 2017. (Matt Patterson via AP)

Denver Broncos running back Jamaal Charles (28) carries the ball during a training camp drill, Wednesday, August 2, 2017 in Denver. (Margaret Bowles via AP)

Washington Redskins quarterback Kirk Cousins (8) tosses the ball in front of a LOVE sign during practice at the Washington Redskins NFL training camp in Richmond, Va., Wednesday, Aug. 2, 2017. (AP Photo/Steve Helber)

Washington Redskins tight end Jordan Reed watches practice at NFL football training camp in Richmond, Va., Wednesday, Aug. 2, 2017. (AP Photo/Steve Helber)

Philadelphia Eagles wide receiver Alshon Jeffery during an NFL football training camp in Philadelphia, Wednesday, Aug. 2, 2017. (AP Photo/Matt Rourke)

Philadelphia Eagles quarterbacks Carson Wentz (11), Matt McGloin (3), and Dane Evans, right, look to pass during an NFL football training camp in Philadelphia, Wednesday, Aug. 2, 2017. (AP Photo/Matt Rourke)

Washington Redskins wide receiver Terrelle Pryor (11) hauls in a pass in front of cornerback Josh Norman (24) during practice at the Washington Redskins NFL training camp in Richmond, Va., Tuesday, Aug. 1, 2017. (AP Photo/Steve Helber)

Washington Redskins quarterback Kirk Cousins (8) tosses a pass during practice at the Washington Redskins NFL training camp in Richmond, Va., Tuesday, Aug. 1, 2017. (AP Photo/Steve Helber)

Denver Broncos quarterback Trevor Siemian (13) during drills at an NFL football training camp Monday, July 31, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)

New England Patriots quarterback Tom Brady (12) passes at NFL football training camp, Tuesday, Aug. 1, 2017, in Foxborough, Mass. (AP Photo/Steven Senne)

Indianapolis Colts wide receiver Donte Moncrief (10) makes a catch during practice at the NFL team's football training camp in Indianapolis, Tuesday, Aug. 1, 2017. (AP Photo/Michael Conroy)

Detroit Lions quarterback Matthew Stafford (9) during training camp practice on Monday, July 31, 2017 in Allen Park, Mich. (Detroit Lions via AP)

Cincinnati Bengals quarterback Andy Dalton throws during an NFL football training camp, Monday, July 31, 2017, in Cincinnati. (AP Photo/John Minchillo)

Detroit Lions cornerback Teez Tabor (30) catches a ball during NFL football training camp in Allen Park, Mich., Monday, July 31, 2017. (AP Photo/Paul Sancya)

Denver Broncos tight end Jake Butt takes part in a rookie ritual and carries in the helmets and pads of veteran players after drills at an NFL football training camp Monday, July 31, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)

Tennessee Titans defensive back Brynden Trawick, center, warms up during NFL football training camp Monday, July 31, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)

Seattle Seahawks quarterback Russell Wilson walks with his wife, pop singer Ciara, after NFL football training camp Monday, July 31, 2017, in Renton, Wash. (AP Photo/Ted S. Warren)

Tennessee Titans quarterback Marcus Mariota (in red) calls a play during NFL football training camp Monday, July 31, 2017, in Nashville, Tenn. (AP Photo/Mark Zaleski)

Jacksonville Jaguars running back Leonard Fournette (27) works out during training camp, Saturday, July. 29th, 2017 in Jacksonville,Fla. (Logan Bowles via AP Images)

Denver Broncos outside linebacker Von Miller holds out a cutout as he signs autographs for fans after drills at an NFL football training camp Sunday, July 30, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)

Arizona Cardinals quarterback Carson Palmer (3) talks with running back David Johnson, left, during an NFL football training camp Saturday, July 29, 2017, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Arizona Cardinals' Robert Nkemdiche (90) and Olsen Pierre (72) run defensive linemen drills during an NFL football training camp Saturday, July 29, 2017, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Buffalo Bills quarterback Tyrod Taylor throws a pass during an NFL football training camp in Pittsford, N.Y., Saturday, July 29, 2017. (AP Photo/Adrian Kraus)

Cincinnati Bengals safety George Iloka (43) breaks up a pass to tight end Tyler Eifert, left, during an NFL football training camp, Saturday, July 29, 2017, in Cincinnati. (AP Photo/John Minchillo)

Los Angeles Rams quarterback Jared Goff looks to throw a pass at NFL football training camp Saturday, July 29, 2017, in Irvine. (AP Photo/Jae C. Hong)

Los Angeles Rams' Lamarcus Joyner arrives at NFL football training camp Saturday, July 29, 2017, in Irvine. (AP Photo/Jae C. Hong)

Kansas City Chiefs offensive guards Jah Reid, left, and Joseph Cheek participate in a drill during NFL football training camp Saturday, July 29, 2017, in St. Joseph, Mo. (AP Photo/Charlie Riedel)

New York Giants wide receiver Odell Beckham (13) and wide receiver Brandon Marshall (15) celebrate after Marshall made a catch during NFL football camp, Saturday, July 29, 2017, in East Rutherford, N.J. (AP Photo/Julio Cortez)

Oakland Raiders running back Marshawn Lynch (24) catches a pass during training camp at the Napa Valley Marriott. (Kirby Lee-USA TODAY Sports)

Denver Broncos running back C.J. Anderson takes part in drills at an NFL football training camp, Saturday, July 29, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)

Cincinnati Bengals wide receiver John Ross runs a drill during NFL football training camp, Saturday, July 29, 2017, in Cincinnati. (AP Photo/John Minchillo)

Tampa Bay Buccaneers wide receiver Mike Evans makes a catch during an NFL football training camp practice Saturday, July 29, 2017, in Tampa, Fla. (AP Photo/Chris O'Meara)

Carolina Panthers' Christian McCaffrey (22) leads running backs in a drill during practice at the NFL team's football training camp at Wofford College in Spartanburg, S.C., Thursday, July 27, 2017. (AP Photo/Chuck Burton)

Pittsburgh Steelers quarterback Ben Roethlisberger (7) during practice at NFL football training camp in Latrobe, Pa., Friday, July 28, 2017 . (AP Photo/Keith Srakocic)

Minnesota Vikings quarterback Sam Bradford (8) throws during an NFL football training camp in Mankato, Minn., Thursday, July 27, 2017. (AP Photo/Andy Clayton-King)

Denver Broncos outside linebacker Von Miller signs autographs for fans after NFL football training camp Thursday, July 27, 2017, in Englewood, Colo. (AP Photo/David Zalubowski)

Chicago Bears quarterback Mike Glennon looks to pass during an NFL football training camp in Bourbonnais, Ill., Thursday, July 27, 2017. (AP Photo/Nam Y. Huh)

Chicago Bears tight end Zach Miller catches a ball during an NFL football training camp in Bourbonnais, Ill., Thursday, July 27, 2017. (AP Photo/Nam Y. Huh)

Jacksonville Jaguars quarterback Blake Bortles (5) throws a pass during NFL football training camp, Thursday, July 27, 2017, in Jacksonville, Fla. (AP Photo/John Raoux)

Jacksonville Jaguars running back Leonard Fournette, right, gets past linebacker Telvin Smith (50) during a drill at NFL football training camp, Thursday, July 27, 2017, in Jacksonville, Fla. (AP Photo/John Raoux)

Green Bay Packers' Johnathan Calvin rides a bike to NFL football training camp Thursday, July 27, 2017, in Green Bay, Wis. (AP Photo/Morry Gash)

Carolina Panthers' Kelvin Benjamin (13) catches a pass during practice at training camp at Wofford College in Spartanburg, S.C., Wednesday, July 26, 2017. (AP Photo/Chuck Burton)

Carolina Panthers' Cam Newton (1) looks to pass during practice at training camp at Wofford College in Spartanburg, S.C., Wednesday, July 26, 2017. (AP Photo/Chuck Burton)

Carolina Panthers' Julius Peppers (90) greets fans before practice at training camp at Wofford College in Spartanburg, S.C., Wednesday, July 26, 2017. (AP Photo/Chuck Burton)

Washington Redskin head coach, Jay Gruden, left, jokes with corner back Josh Norman, right, as the arrive at the start of the Washington Redskins NFL training camp in Richmond,. Va., Thursday, July 27, 2017. (AP Photo/Steve Helber)

Houston Texans wide receiver DeAndre Hopkins (10) and quarterback Tom Savage (3) after the first day of Houston Texans training camp at the Greenbrier in White Sulphur Springs, West Virginia on July 26, 2017. (Matt Patterson via AP)

Arizona Cardinals cornerback Patrick Peterson (21) works out during a Cardinals' camp, Monday, July 24, 2017, in Glendale, Ariz. (AP Photo/Rick Scuteri)

Dallas Cowboys running back Ezekiel Elliott signs autographs at the end of the day at NFL football training camp in Oxnard, Calif., Tuesday, July 25, 2017. (AP Photo/Gus Ruelas)

Arizona Cardinals receiver J.J. Nelson makes a catch during an NFL football training camp Monday, July 24, 2017, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Arizona Cardinals quarterback Carson Palmer (3) gets ready for the snap of the ball as receiver Larry Fitzgerald (11) runs in motion during an NFL football training camp Monday, July 24, 2017, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Dallas Cowboys running back Ezekiel Elliott (21) runs away from cornerback Orlando Scandrick (32) during an NFL training camp, Tuesday, July 25, 2017 in Oxnard, California. (James D Smith via AP)

Dallas Cowboys head coach Jason Garrett (center) talks to the team after the Cowboys first day of NFL training camp, Monday, July 24, 2017 in Oxnard, California. (James D Smith via AP)

Dallas Cowboys quarterback Dak Prescott, left, and head coach Jason Garrett have fun after playing catch following practice at the NFL football team's training camp in Oxnard, Calif., Monday, July 24, 2017. (AP Photo/Michael Owen Baker)

Dallas Cowboys receiver Dez Bryant (88) reaches for a pass as cornerback Orlando Scandrick (32) defends during the Cowboys first day of NFL training camp, Monday, July 24, 2017 in Oxnard, California. (James D Smith via AP)

Dallas Cowboys head coach Jason Garrett (center) talks to the team after the Cowboys first day of NFL training camp, Monday, July 24, 2017 in Oxnard, California. (James D Smith via AP)

Arizona Cardinals quarterback Carson Palmer warms up at University of Phoenix Stadium during an NFL football training camp practice Monday, July 24, 2017, in Glendale, Ariz. (AP Photo/Ross D. Franklin)

Seattle Seahawks cornerback Richard Sherman, right, stretches with strong safety Kam Chancellor, center, and free safety Earl Thomas, left, during NFL football training camp, Sunday, July 30, 2017, in Renton, Wash. (AP Photo/Ted S. Warren)

Tampa Bay Buccaneers quarterback Jameis Winston (3) sets to pass during for an NFL football training camp practice against the Jacksonville Jaguars Tuesday, Aug. 15, 2017 in Jacksonville, Fla. (Al Messerschmidt via AP)

Detroit Lions wide receiver Marvin Jones Jr. and Indianapolis Colts quarterback Andrew Luck talk following training camp practice on Friday, Aug. 11, 2017 in Indianapolis. (Detroit Lions via AP)

Cleveland Browns quarterback Cody Kessler throws during practice at the NFL football team's training camp facility, Wednesday, Aug. 16, 2017, in Berea, Ohio. (AP Photo/Tony Dejak)

Detroit Lions quarterback Matthew Stafford throws during practice at the NFL team's football training camp Thursday, Aug. 10, 2017, in Indianapolis. (AP Photo/Darron Cummings)

Houston Texans linebacker Jadeveon Clowney(90) and J.J. Watt(99) during Houston Texans OTA Tuesday, May 23, 2017 in Houston, TX. (AP Photo/Bill Baptist)