What this means for the Bears
They're getting a head coach who, in both previous journeys as head coach, has won the majority of his games. Fox carries a career head coaching record of 119-89 (.572) into Chicago - nine years with the Carolina Panthers (73-71, .507) and four years in Denver (46-18, .719).
In the postseason, Fox is 8-7 all-time with two Super Bowl losses, including a 3-4 postseason record in Denver.
Fox is a defensive-minded coach who is renowned for adjusting to his players' strengths and putting together a strong coaching staff. Critiques on Coach Fox include his clock management, (lack of) aggression, in-game adjustments, and general game-time decision-making.
It means the Bears are getting another former Bronco. Quarterback Jay Cutler and wide receiver Brandon Marshall never played for Fox in Denver, but it's interesting to see so many former Broncos players and coaches who wore orange and blue donning different shades of the colors in Chicago.
Did the Bears tamper?
The hire is giving many Broncos fans a sour taste in their mouths as we wonder whether Fox had one foot out the door against the Indianapolis Colts in the playoffs. Reports suggest that the "mutual parting of ways" between Fox and the Broncos was more Fox's idea than the Broncos, with Jay Glazer's day-before-the-game report being a catalyst.
Indeed, the Bears' hire of Ernie Accorsi, former boss of Fox, as a consultant in their GM and coach search seemed to be as much a nail in Fox's Broncos-coaching coffin as Denver's playoff loss.
What this means for the Broncos
Will any of Fox's assistants follow him to Chi-town? We know Jack Del Rio is in Oakland, but there's a possibility that Fox will be interested in bringing in Adam Gase, among others.
It means the Broncos won't be on the hook for most of John Fox's contract - the remaining two years and $11 million will be mostly covered in Fox's four-year deal with the Bears.
Also, on the Broncos schedule in 2015: a road trip to Chicago to face the Bears. Forget the Cutler Bowl, this will be the John Fox Bowl now!
Congratulations Coach Fox. We wish you the best in Chicago - unless you really had one foot out the door in the Divisional round. If that's the case, may you lose all your games with Cutler, like we expect you to.