Former Bears head coach John Fox

Bears coach John Fox in the first quarter against the Vikings.

Bears coach John Fox before the regular-season finale against the Vikings on Dec. 31, 2017.

Bears coach John Fox hugs wide receiver Kendall Wright before the Week 17 game vs. the Vikings on Dec. 31, 2017.

Bears coach John Fox walks on the sidelines during the first half against the Browns at Soldier Field on Dec. 24, 2017.

Bears coach John Fox watches from the sidelines during the first half against the Lions at Ford Field in Detroit, Saturday, Dec. 16, 2017.

Bears coach John Fox walks on the sidelines during the first half against the Lions at Ford Field in Detroit, Saturday, Dec. 16, 2017.

Bears coach John Fox talks with players as they walk to the sidelines during the first half against the Lions at Ford Field in Detroit, Saturday, Dec. 16, 2017.

Bears coach John Fox celebrates with free safety Eddie Jackson after an INT against the Bengals on Dec. 10, 2017.

Bears coach John Fox works the sidelines in the first half against the Bengals on Dec. 10, 2017.

John Fox argues with the referees against the Bengals during the 2nd half at Paul Brown Stadium on Dec. 10, 2017.

Bears coach John Fox looks up at the video board in the fourth quarter against the 49ers at Soldier Field Sunday, Dec. 3, 2017.

Bears coach John Fox looks on from the sidleines as quarterback Mitchl Trubisky moves to the field against the 49ers at Soldier Field on Sunday, Dec. 3, 2017.

Bears coach John Fox looks on from the sideline in the fourth quarter against the Eagles on Sunday, Nov. 26, 2017.

Bears coach John Fox looks on during the second of a game against the Eagles at Lincoln Financial Field in Philadelphia on Sunday Nov. 26, 2017.

Bears coach John Fox celebrates a touchdown with running back Tarik Cohen (29) during the second half against the Lions, Sunday, Nov. 19, 2017.

Bears head coach John Fox looks on during the first half against the Lions at Soldier Field on Sunday Nov. 19, 2017.

Bears coach John Fox argues a call with line judge Bart Longson (2) during the first half of a game against the Packers, Sunday, Nov. 12, 2017.

Bears quarterback Mitch Trubisky and coach John Fox talk during warm-ups prior to the game against the Packers at Soldier Field on Sunday, Nov. 12, 2017.

Bears coach John Fox yells at referees after it was determined Zach Miller didn’t maintain control on a pass in the end zone against the Saints on Oct. 29, 2017.

Bears coach John Fox celebrates with his defense after they hold off the Panthers on a fourth-and-two play in the third quarter at Soldier Field on Sunday, Oct. 22, 2017.

Bears coach John Fox looks on in the second quarter against the Panthers at Soldier Field on Oct. 22, 2017.

Bears head coach John Fox looks at a video board during a game against the Ravens at M&T Bank Stadium in Baltimore on Sunday, Oct. 15, 2017.

Bears coach John Fox shouts during the second quarter of a game against the Vikings at Soldier Field on Monday Oct. 9, 2017.

Bears coach John Fox links arms with receiver Deonte Thompson (14) and receiver Josh Bellamy (15) for the national anthem on Thursday, Sept. 28, 2017 at Lambeau Field.

Bears coach John Fox before a game against the Packers on Thursday, Sept. 28, 2017 at Lambeau Field.

Bears coach John Fox argues a call with line judge Dana McKenzie (8) during the first half of a game against the Steelers, Sunday, Sept. 24, 2017.

Bears head coach John Fox paces the sideline in the second quarter against the Buccaneers at Raymond James Stadium in Tampa on Sunday, Sept. 17, 2017.

Bears head coach John Fox signals from the sidelines during the fourth quarter against the Buccaneers on Sunday, Sept. 17, 2017, at Raymond James Stadium in Tampa.

John Fox walks off the field after the Bears lost to the Falcons 23-17 in the Bears season opener at Solider Field on Sunday, Sept. 10, 2017.

John Fox pats quarterback Mike Glennon on the back during the last drive of the fourth quarter at Soldier Field on Sunday, Sept. 10, 2017.

John Fox watches during the first half of a game against the Falcons at Soldier Field on Sunday, Sept. 10, 2017.

Bears coach John Fox during the second half of the last preseason game against the Browns on Aug. 31, 2017.

John Fox looks at the scoreboard in the first half of an exhibition between the Bears and the Titans on Sunday, Aug. 27, 2017, in Nashville, Tenn.

Bears head coach John Fox watches during a preseason game against the Cardinals on Aug. 19, 2017, in Glendale, Ariz.

Bears coach John Fox talks with Cardinals coach Bruce Arians prior to the start of a game at University of Phoenix Stadium on Aug. 19, 2017, in Glendale, Ariz.

Bears head coach John Fox walks around the field before a preseason game against the Broncos on Aug. 10, 2017.

Bears head coach John Fox during Family Fest at Soldier Field on Saturday, Aug. 5, 2017.

Bears head coach John Fox tries to get a selfie with a fan — before asking his security guard for help — at the conclusion of his team’s practice at Family Fest at Soldier Field on Saturday Aug. 5, 2017.

Bears head coach John Fox approaches wide receiver Kevin White during Family Fest at Soldier Field on Saturday, Aug. 5, 2017.

Bears head coach John Fox chats with defensive back Marcus Cooper at the first day of Bears camp at Olivet Nazarene University in Bourbonnais on Thursday, July 27, 2017.

Bears coach John Fox speaks Wednesday, July 26, 2017, as the Bears report to training camp at Olivet Nazarene University in Bourbonnais.

Bears coach John Fox talks to the media following the second day of minicamp at Halas Hall on June 14, 2017.

Bears head coach John Fox smiles as he talks to his players at practice on May 30, 2017.

John Fox watches practice at Bears rookie minicamp at Halas Hall on May 12, 2017.

Bears coach John Fox speaks during a press conference at the NFL Combine in Indianapolis on March 1, 2017.

John Fox walks off the field following the Bears’ season-ending loss to the Vikings at U.S. Bank Stadium in Minneapolis on Jan. 1, 2017.

Bears head coach John Fox grimaces against the Redskins during the first half on Dec. 24, 2016.

John Fox on the sideline in the third quarter of a game against the Packers at Soldier Field in Chicago on Sunday, Dec. 18, 2016.

John Fox talks with Leonard Floyd during the game against the Lions in Detroit on Saturday, Dec 11, 2016.

Bears coach John Fox during the game against the 49ers at Soldier Field on Dec. 4, 2016.

Bears coach John Fox on the sidelines in the first quarter against the Titans at Soldier Field on Nov. 27, 2016.

Bears coach John Fox talks to Titans wide receiver (and former Bear) Marc Mariani before the game at Soldier Field on Nov. 27, 2016.

Bears coach John Fox during the 36-10 loss to the Bucs in Tampa Bay on Nov. 13, 2016.

Bears coach John Fox jumps out of the way while the Vikings’ Harrison Smith tackles Zach Miller during the second half at Soldier Field on Oct. 31, 2016.

Bears head coach John Fox walks on the field during warm-ups before a game against the Jaguars at Soldier Field on Oct. 16, 2016.

John Fox speaks to a referee on the sidelines during the game against the Colts at Lucas Oil Stadium on Oct. 9, 2016.

Bears coach John Fox watches his team take on the Lions at Soldier Field on Oct. 2, 2016.

Bears coach John Fox looks on in the fourth quarter against the Cowboys at AT&T Stadium in on Sept. 25, 2016.

John Fox leaves the field after a loss to the Eagles at Soldier Field on Monday, Sept. 19, 2016.

John Fox during the fourth quarter against the Eagles at Soldier Field on Monday, Sept. 19, 2016.

John Fox during the second half against the Texans at NRG Stadium in Houston on Sunday, Sept. 11, 2016.

John Fox during warmups before the start of his team’s game against the Texans at NRG Stadium in Houston on Sunday, Sept. 11, 2016.

Bears head coach John Fox works the sidelines in the first half of a preseason game against the Browns on Sept. 1, 2016.

Bears head coach John Fox watches from the sideline during the second half of a preseason football game against the Chiefs at Soldier Field on Aug. 27, 2016.

Bears head coach John Fox speaks to quarterback Jay Cutler before a preseason game against the Patriots on Aug. 18, 2016, in Foxborough, Mass.

Bears coach John Fox talks with running back Jeremy Langford as he stretches with his team during the first day of mandatory minicamp on June 14, 2016 at Halas Hall.

Bears head coach John Fox smiles as he talks to offensive line Kyle Long during a minicamp practice on June 16, 2016.

Reporters and photographers are reflected in the sunglasses of Bears head coach John Fox as he holds a news conference after a minicamp on June 14, 2016.

Bears coach John Fox watches his players during stretches and warm-ups on the first day of rookie minicamp at Halas Hall on May 13, 2016.

Bears head coach John Fox responds to a question during a news conference at the NFL scouting combine on Feb. 24, 2016, in Indianapolis.

John Fox and general manager Ryan Pace smile after taking questions at Halas Hall.

John Fox takes questions at Halas Hall.

Bears head coach John Fox acknowledges fans as walks off the field after a 24-20 loss to the Lions at Soldier Field.

Bears wide receiver Josh Bellamy celebrates with head coach John Fox after his touchdown against the Lions during the second half.

Bears coach John Fox hugs running back Matt Forte after touchdown against the Lions during the second half.

Bears defensive coordinator Vic Fangio, from left, head coach John Fox and offensive coordinator Adam Gase watch players warm up before the finale against the Lions.

Ka’Deem Carey celebrates with John Fox after his touchdown in the first half against the Tampa Bay Buccaneers.

Bears coach John Fox has a pregame chat with Eddie Goldman ahead of their game at Tampa Bay.

Bears coach John Fox during the first half of their game against the Vikings at TCF Bank Stadium.

Bears head coach John Fox celebrates after a touchdown by running back Matt Forte in the third quarter against the Redskins at Soldier Field.

Bears wide receiver Alshon Jeffery is congratulated by John Fox after scoring a touchdown during the first half against the Redskins.

Bears head coach John Fox late in the fourth quarter of his team’s game against the 49ers at Soldier Field.

John Fox celebrates a defensive stand against the Packers in the fourth quarter.

John Fox hugs Tracy Porter in the fourth quarter against the Packers.

Bears coach John Fox and Broncos coach Gary Kubiak greet one another after the Broncos beat the Bears 17-15 at Soldier Field.

Bears coach John Fox walks off the field after losing to the Broncos at Soldier Field.

Bears coach John Fox talks to quarterback Jay Cutler as Cutler walks to the bench during the second half against the Broncos at Soldier Field.

John Fox congratulates his team after a fake punt attempt by the Rams goes wrong and the Bears took possession of the ball in the fourth quarter.

Bears coach John Fox watches the action against the Rams.

John Fox looks on against the Chargers at Qualcomm Stadium.

Bears head coach John Fox watches from the sideline during the first half against the Vikings.

Bears head coach John Fox yells to his players from the sidelines during the second half against the Vikings at Soldier Field.

Bears head coach John Fox talks to Vikings head coach Mike Zimmer before the game.

Bears head coach John Fox keeps an eye on things at practice at Halas Hall.

John Fox walks off the field after the Bears lost to the Detroit Lions in overtime, 37-34, at Ford Field.

Bears coach John Fox reacts after a Lions touchdown at Ford Field.

Bears coach John Fox watches from the sidelines during the first half against the Lions.

John Fox celebrates after a victory over the Kansas City Chiefs.

John Fox congratulates his defense in the second quarter of a game against the Kansas City Chiefs.