New England Patriots head coach Bill Belichick, left, talks with Detroit Lions head coach Matt Patricia during drills at the Lions NFL training camp facility, Tuesday, Aug. 6, 2019, in Allen Park, Mich.

Denver Broncos running back Theo Riddick, second from front, takes part in drills during an NFL football training camp session Tuesday, Aug. 6, 2019, in Englewood, Colo.

Arizona Cardinals wide receiver Damiere Byrd (14) eyes the football before making a catch as Cardinals cornerback Robert Alford (23) defends during an NFL football training camp practice at State Farm Stadium Tuesday, Aug. 6, 2019, in Glendale, Ariz.

Arizona Cardinals head coach Kliff Kingsbury, right, talks with rookie quarterback Kyler Murray (1) during an NFL football training camp practice at State Farm Stadium Tuesday, Aug. 6, 2019, in Glendale, Ariz.

Arizona Cardinals wide receiver Larry Fitzgerald runs with the football after making a catch during an NFL football training camp practice at State Farm Stadium Tuesday, Aug. 6, 2019, in Glendale, Ariz.

Cleveland Browns quarterback Baker Mayfield (6) hands off to running back Kareem Hunt (27) during practice at the NFL football team's training facility Monday, Aug. 5, 2019, in Berea, Ohio.

Cleveland Browns cornerback Greedy Williams returns an interception during practice at the NFL football team's training facility Monday, Aug. 5, 2019, in Berea, Ohio.

Miami Dolphins players pose for a photo after the teams NFL football training camp, Monday, Aug. 5, 2019, in Davie, Fla. The Dolphins allowed a franchise record 6,257 yards in 2018, and new coach Brian Flores has brought to Miami a scheme that redefines the meanings of positions.

Denver Broncos outside linebacker Von Miller, right, drives past tight end Troy Fumagalli during an NFL football training camp session Monday, Aug. 5, 2019, in Englewood, Colo.

Miami Dolphins quarterback Ryan Fitzpatrick, right, signs autographs for kids after the teams NFL football training camp, Monday, Aug. 5, 2019 in Davie, Fla.

Washington Redskins wide receiver Terry McLaurin (17) runs drills with teammates Samaje Perine (32) and Darlin Kidsy Jr., (84) during the Washington Redskins NFL football training camp in Richmond, Va., Monday, Aug. 5, 2019.

Washington Redskins linebacker Montez Sweat (90) runs a drill during the Washington Redskins NFL football training camp in Richmond, Va., Monday, Aug. 5, 2019.

Washington Redskins head coach Jay Gruden, left, talks with running back Derrius Guice (29) during NFL football training camp in Richmond, Va., Monday, Aug. 5, 2019.

Pittsburgh Steelers outside linebacker T.J. Watt makes a one-handed catch in a drill during an NFL football practice, Sunday, Aug. 4, 2019, in Pittsburgh.

Pittsburgh Steelers cornerback Justin Layne, bottom, stretches with the defense during an NFL football practice at Heinz Field, Sunday, Aug. 4, 2019, in Pittsburgh.

Pittsburgh Steelers center Maurkice Pouncey tosses a medicine ball during an NFL football practice, Sunday, Aug. 4, 2019, in Pittsburgh.

Pittsburgh Steelers wide receiver JuJu Smith-Schuster (19) tries for the ball as cornerback Steven Nelson (22) defends during an NFL football practice, Sunday, Aug. 4, 2019, in Pittsburgh.

Detroit Lions quarterback Matthew Stafford looks downfield during drills at the Lions NFL training camp facility, Sunday, Aug. 4, 2019, in Allen Park, Mich.

Detroit Lions running back Ty Johnson runs through a drill at the Lions NFL training camp facility, Sunday, Aug. 4, 2019, in Allen Park, Mich.

New Orleans Saints quarterback Drew Brees signs autographs for fans after training camp at their NFL football training facility in Metairie, La., Monday, July 29, 2019.

Jacksonville Jaguars wide receiver Chris Conley, right, makes a reception in front of cornerback Tre Herdon during a scrimmage at an NFL football practice at the teams stadium, Friday, Aug. 2, 2019, in Jacksonville, Fla.

Jacksonville Jaguars cornerback Brandon Watson, right, makes a one handed catch to intercept a pass intended for wide receiver D.J. Chark (17) during an NFL football practice at the teams stadium, Friday, Aug. 2, 2019, in Jacksonville, Fla.

Jacksonville Jaguars quarterback Nick Foles (7) throws a pass during an NFL football practice at the teams training facility, Thursday, Aug. 1, 2019, in Jacksonville, Fla.

Arizona Cardinals quarterback Kyler Murray throws the football during an NFL football training camp practice Wednesday, July 31, 2019, in Glendale, Ariz.

Pittsburgh Steelers quarterback Ben Roethlisberger (7) during practice at their NFL football training camp in Latrobe, Pa., Thursday, Aug. 1, 2019.

New England Patriots quarterback Tom Brady (12) passes the ball during an NFL football training camp practice, Thursday, Aug. 1, 2019, in Foxborough, Mass.

Miami Dolphins quarterback Ryan Fitzpatrick takes a snap as he runs drills at the teams NFL football training camp, Thursday, Aug. 1, 2019 in Davie, Fla.

Los Angeles Chargers defensive end Joey Bosa enters practice during NFL football training camp in Costa Mesa, Calif., Tuesday, July 30, 2019.

Tampa Bay Buccaneers quarterback Jameis Winston (3) throws a pass while running a drill during an NFL football training camp practice Tuesday, July 30, 2019, in Tampa, Fla.

Cleveland Browns wide receiver Odell Beckham (13) and quarterback Baker Mayfield (6) walk together during an NFL football training camp practice on Wednesday, July 31, 2019 in Berea, Ohio.

Los Angeles Rams quarterback Jared Goff throws the ball during NFL football training camp in Irvine, Calif., Tuesday, July 30, 2019.

Washington Redskins offensive lineman, Hugh Thornton (69) runs drills as he is directed by offensive line coach Bill Callahan, right, during NFL football training camp in Richmond, Va., Wednesday, July 31, 2019. Thornton was signed Wednesday.

Indianapolis Colts quarterback Chad Kelly (6) throws during practice at the NFL team's football training camp in Westfield, Ind., Wednesday, July 31, 2019.

Tennessee Titans quarterback Marcus Mariota runs a drill during NFL football training camp Wednesday, July 31, 2019, in Nashville, Tenn.

Tennessee Titans quarterback Ryan Tannehill runs a drill during NFL football training camp Wednesday, July 31, 2019, in Nashville, Tenn.

Arizona Cardinals quarterback Kyler Murray takes a snap of a football during an NFL training camp Wednesday, July 31, 2019, in Glendale, Ariz.

Arizona Cardinals wide receiver Andy Isabella runs with the ball during an NFL football training camp practice Wednesday, July 31, 2019, in Glendale, Ariz.

Arizona Cardinals head coach Kliff Kingsbury watches his quarterbacks during an NFL football training camp practice Wednesday, July 31, 2019, in Glendale, Ariz.

New England Patriots wide receiver Dontrelle Inman makes a catch during an NFL football training camp practice, Thursday, Aug. 1, 2019, in Foxborough, Mass.

Indianapolis Colts linebacker E.J. Speed (45) makes a catch during practice at the NFL team's football training camp in Westfield, Ind., Thursday, Aug. 1, 2019.

New England Patriots wide receiver Julian Edelman, center, warms up during an NFL football training camp practice, Thursday, Aug. 1, 2019, in Foxborough, Mass.

Kansas City Chiefs players run to the indoor practice facility after a nearby lightning strike during NFL football training camp Wednesday, July 31, 2019, in St. Joseph, Mo.

New Orleans Saints wide receiver Michael Thomas (13) runs drills against cornerback P.J. Williams (26) during training camp at their NFL football training facility in Metairie, La., Thursday, Aug. 1, 2019.

New Orleans Saints wide receiver Michael Thomas talks to wide receivers coach Curtis Johnson during training camp at their NFL football training facility in Metairie, La., Thursday, Aug. 1, 2019.

New Orleans Saints wide receiver Michael Thomas (13) runs through drills against cornerback Marshon Lattimore (23) during training camp at their NFL football training facility in Metairie, La., Thursday, Aug. 1, 2019.

New Orleans Saints quarterback Taysom Hill (7) runs through drills against linebacker Vince Biegel during training camp at their NFL football training facility in Metairie, La., Thursday, Aug. 1, 2019.

New York Giants' Eli Manning (10) throws a pass as Brian Mihalik (68) blocks during drills at the NFL football team's training camp Thursday, Aug. 1, 2019, in East Rutherford, N.J.

Cleveland Browns wide receiver Jarvis Landry (80) catches the ball during an NFL football training camp practice on Wednesday, July 31, 2019 in Berea, Ohio.

Cleveland Browns wide receiver Odell Beckham (13) catches the ball during an NFL football training camp practice on Wednesday, July 31, 2019 in Berea, Ohio.

Cleveland Browns quarterback Baker Mayfield (6) prepares for the snap during an NFL football training camp practice on Wednesday, July 31, 2019 in Berea, Ohio.

Pittsburgh Steelers defensive end Cameron Heyward (97) tries to catch another while holding multiple balls he caught in a punt simulation catching drill during practice at their NFL football training camp in Latrobe, Pa., Thursday, Aug. 1, 2019.

New York Jets quarterback Sam Darnold (14) hands the ball off to New York Jets running back Le'Veon Bell (26) during NFL training camp at Atlantic Health Jets Training Center in Florham Park, N.J. on July 25, 2019.

Kansas City Chiefs quarterback Patrick Mahomes (15) leads teammates onto the field for a drill during NFL football training camp Monday, July 29, 2019, in St. Joseph, Mo.

Denver Broncos quarterback Joe Flacco warms up during an NFL football training camp practice at the team's headquarters Tuesday, July 30, 2019, in Englewood, Colo.

Los Angeles Rams quarterback Blake Bortles during an NFL football training camp in Irvine, Calif. Monday, July 29, 2019.

New England Patriots quarterback Tom Brady winds up to pass the ball during an NFL football training camp practice, Thursday, July 25, 2019, in Foxborough, Mass.

Los Angeles Rams wide receiver Cooper Kupp during an NFL football training camp in Irvine, Calif. Monday, July 29, 2019.

Miami Dolphins quarterback Josh Rosen takes a snap as he runs drills at the teams NFL football training camp, Tuesday, July 30, 2019 in Davie, Fla.

New York Jets wide receiver Robby Anderson catches the ball during NFL training camp at Atlantic Health Jets Training Center in Florham Park, N.J. on July 25, 2019.

New York Jets defensive tackle Quinnen Williams (95) practices with defensive end Leonard Williams (92) during NFL training camp at Atlantic Health Jets Training Center in Florham Park, N.J. on July 25, 2019.

New York Jets running back Le'Veon Bell (26) during NFL training camp at Atlantic Health Jets Training Center in Florham Park, N.J. on July 25, 2019.

Dallas Cowboys tight end Jason Witten runs upfield after a reception at the NFL football team's training camp in Oxnard, Calif., Monday, July 29, 2019.

Oakland Raiders quarterback Derek Carr throws as head coach Jon Gruden, right, looks on during NFL football training camp Monday, July 29, 2019, in Napa, Calif.

Los Angeles Chargers defensive end Joey Bosa runs a drill during an NFL football training camp in Costa Mesa, Calif., Monday, July 29, 2019.

Carolina Panters quarterback Cam Newton Cam Newton�(1) looks to pass during practice at the NFL football team's training camp in Spartanburg, S.C., Monday, July 29, 2019.

Carolina Panters defensive line coach Sam Mills III, left, runs a drill with Gerald McCoy, right, during practice at the NFL football team's training camp in Spartanburg, S.C., Monday, July 29, 2019.

Seattle Seahawks quarterback Russell Wilson (3) passes next to backup quarterbacks Paxton Lynch (2) and Geno Smith, right, Monday, July 29, 2019, during NFL football training camp in Renton, Wash.

Minnesota Vikings wide receiver Stefon Diggs runs a route during the NFL football team's training camp Monday, July 29, 2019, in Eagan, Minn.

Minnesota Vikings quarterback Kirk Cousins throws during the NFL football team's training camp Monday, July 29, 2019, in Eagan, Minn.

Cincinnati Bengals quarterback Andy Dalton (14) throws the ball during NFL football training camp, Monday, July 29, 2019, in Cincinnati.

Los Angeles Rams safety Eric Weddle looks on from the sideline during an NFL football training camp in Irvine, Calif., Monday, July 29, 2019.

Dallas Cowboys quarterback Dak Prescott passes at the NFL football team's training camp in Oxnard, Calif., Monday, July 29, 2019.

Dallas Cowboys wide receiver Amari Cooper (19) at the NFL football team's training camp in Oxnard, Calif., Monday, July 29, 2019.

Indianapolis Colts wide receiver T.Y. Hilton (13) makes a catch during practice at the NFL team's football training camp in Westfield, Ind., Tuesday, July 30, 2019.

Indianapolis Colts kicker Adam Vinatieri (4) kicks a field goal during practice at the NFL team's football training camp in Westfield, Ind., Tuesday, July 30, 2019.

Carolina Panthers Christian McCaffrey (22) runs a drill during practice at the NFL football team's training camp in Spartanburg, S.C., Monday, July 29, 2019.

Denver Broncos quarterback Drew Lock warms up during an NFL football training camp practice at the team's headquarters in Englewood, Colo., Tuesday, July 30, 2019.

Los Angeles Rams running back Todd Gurley during an NFL football training camp in Irvine, Calif. Monday, July 29, 2019.

New York Jets quarterback Sam Darnold (14) practices during NFL training camp at Atlantic Health Jets Training Center in Florham Park, N.J. on July 25, 2019.

Cleveland Browns wide receiver Odell Beckham Jr. catches a pass during training camp at the NFL football team's training camp facility, Thursday, July 25, 2019, in Berea, Ohio.

Carolina Panthers' link-placeholder-1 throws a pass to Greg Olsen (88) during practice at the NFL football team's training camp in Spartanburg, N.C., Thursday, July 25, 2019.

Arizona Cardinals' Kyler Murray (1) runs drills during the teams' NFL football training camp, Thursday, July 25, 2019, in Glendale, Ariz.

Seattle Seahawks quarterback Russell Wilson (3) passes as head coach Pete Carroll stands nearby at right, during NFL football training camp, Thursday, July 25, 2019, in Renton, Wash.

Seattle Seahawks wide receiver D.K. Metcalf makes a catch during NFL football training camp, Thursday, July 25, 2019, in Renton, Wash.

New York Giants' quarterback Daniel Jones watches as Eli Manning throws a pass at the NFL football team's training camp in Thursday, July 25, 2019, in East Rutherford, N.J.

Cleveland Browns wide receiver Odell Beckham Jr. catches a pass during training camp at the NFL football team's training camp facility, Thursday, July 25, 2019, in Berea, Ohio.

Green Bay Packers head coach Matt LaFleur watches during NFL football training camp Thursday, July 25, 2019, in Green Bay, Wis.

Seattle Seahawks head coach Pete Carroll throws a football during NFL football training camp, Thursday, July 25, 2019, in Renton, Wash.

Baltimore Ravens quarterback Robert Griffin III reacts to a comment by a young fan while signing autographs during NFL football training camp, Thursday, July 25, 2019, in Owings Mills, Md.

Minnesota Vikings wide receiver Dillon Mitchell reaches for a pass during the NFL football team's training camp which opened with rookies and select veterans Tuesday July 23, 2019, in Eagan, Minn.

Denver Broncos quarterback Joe Flacco (5) takes part in drills during the opening day of the team's NFL football training camp Thursday, July 18, 2019, in Englewood, Colo.

Baltimore Ravens quarterback Robert Griffin III reacts while talking to teammates during NFL football training camp, Thursday, July 25, 2019, in Owings Mills, Md.

Buffalo Bills quarterback Josh Allen takes a selfie with fans after practice at the NFL football team's training camp in Pittsford, N.Y., Thursday, July 25, 2019.

New York Jets quarterback Sam Darnold throws during practice at the NFL football team's training camp in Florham Park, N.J., Thursday, July 25, 2019.

Kansas City Chiefs quarterback Patrick Mahomes throws during NFL football training camp Wednesday, July 24, 2019, in St. Joseph, Mo.

Miami Dolphins quarterback Ryan Fitzpatrick signs autographs during NFL football training camp,Thursday, July 25, 2019, in Davie, Fla.

Miami Dolphins quarterback Josh Rosen (3) does drills during NFL football training camp, Thursday, July 25, 2019, in Davie, Fla.

Philadelphia Eagles wide receiver J.J. Arcega-Whiteside catches a pass at the NFL football team's training camp in Philadelphia, Thursday, July 25, 2019.

Cleveland Browns wide receiver Jarvis Landry catches a pass during practice at the NFL football team's training camp facility, Thursday, July 25, 2019, in Berea, Ohio.

Seattle Seahawks quarterback Russell Wilson (3) talks with offensive tackle George Fant (74) during NFL football training camp, Thursday, July 25, 2019, in Renton, Wash.

Seattle Seahawks quarterback Russell Wilson (3) signs autographs for fans following NFL football training camp, Thursday, July 25, 2019, in Renton, Wash.

Buffalo Bills quarterback Josh Allen runs a scrambling drill during practice at the NFL football team's training camp in Pittsford, N.Y., Friday, July 26, 2019.

New York Jets' Luke Falk participates in a practice at the NFL football team's training camp in Florham Park, N.J., Friday, July 26, 2019.

Baltimore Ravens defensive back Anthony Levine, right, defends against tight end Mark Andrews while working out during NFL football training camp, Friday, July 26, 2019, in Owings Mills, Md.

Baltimore Ravens defensive back Terrell Bonds, right, gets his hands on the mask of wide receiver Jaylen Smith while running a drill during NFL football training camp, Friday, July 26, 2019, in Owings Mills, Md.