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Firing-and-hiring season in the NFL is in full swing.

The Colts and Raiders followed the Giants' lead, cutting ties with their head coaches -- Chuck Pagano and Jack Del Rio, respectively -- after their regular-season finales. The Jets and Bucs, meanwhile, decided not to make changes at the helm.

Here are 21 coaching candidates to know, with help from our ESPN NFL Insiders. And what does our coaching hot seat model say about who's likely to get fired?

Here's everything you need to know about the NFL coaching carousel:

Open jobs

Indianapolis Colts

The Colts fired Chuck Pagano after the team's season-ending win over the Texans on Sunday. Pagano went 53-45 in six seasons in Indianapolis, missing the playoffs the last three years.

Wells: Jim Irsay must let GM Chris Ballard lead coaching search
Wells: A look at potential replacements for Pagano

New York Giants

The Giants hired Dave Gettleman as their new general manager after firing Ben McAdoo and general manager Jerry Reese in the middle of a 2-10 season. Eagles defensive coordinator Jim Schwartz is expected to be a favorite for the head-coaching job, sources told ESPN's Adam Schefter.

Raanan: Coaching search expected to center around 'usual suspects'
Sando: Now what for the Giants? Potential replacements at head coach

Oakland Raiders

Jack Del Rio was fired after the Raiders' season-ending loss to the Chargers, bringing an end to his three-year tenure after a disappointing 6-10 record this year. According to league sources earlier in the day, Oakland is preparing to pursue ESPN analyst Jon Gruden with an offer so strong it could even include an ownership stake in the team.

Jobs expected to come open

Arizona Cardinals

Cardinals coach Bruce Arians is likely to step away from the game after this season, though he has not informed the team of his plans yet, league sources told ESPN's Adam Schefter.

Weinfuss: Past two years won't impact Arians' decision to return in 2018

Chicago Bears

John Fox is not expected to return after this season, league sources told ESPN's Adam Schefter before the Bears' season finale against the Vikings.

Dickerson: Fox's legacy in Chicago will be defined by a historic lack of production
Dickerson: If Bears fire Fox, here are possible candidates to consider

Cincinnati Bengals

After 15 years in Cincinnati, Marvin Lewis plans to leave the Bengals after the season to pursue opportunities elsewhere, league sources told ESPN on Dec. 17.

Terrell: Lewis wants to keep coaching, vague on future plans
Terrell: Timing is right for Lewis, Bengals to part ways

Jobs that could come open

Cleveland Browns

Hue Jackson has only one win in two seasons as the Browns' coach, but after firing executive vice president of football operations Sashi Brown on Dec. 7, owner Jimmy Haslam said in a statement that Jackson will return in 2018. New GM John Dorsey has said he expects Jackson back, too.

McManamon: Haslam sees Jackson going from 0-16 goat to future hero
McManamon: Move to fire Brown all about 2018 draft

Dallas Cowboys

Jason Garrett was the 2016 Coach of the Year after leading the Cowboys to a 13-3 record with a rookie quarterback and rookie running back. But Dallas has been one of the bigger disappointments of 2017.

Archer: Cowboys know dangers of team making in-season coaching change

Denver Broncos

The Broncos have never fired a coach who started and finished just one season with the team, but league sources told ESPN's Adam Schefter on Sunday that Vance Joseph faces increasingly longer odds of returning in 2018.

Houston Texans

Bill O'Brien has one year left on his contract, so the Texans could sign him to an extension early in the offseason, or he and the team will part ways. League sources told Adam Schefter on Sunday that O'Brien is likely to be back next season.