We know that there are numerous coaching changes in the NFL each offseason. Although we don’t know exactly which teams will flop, we do have an idea of which coaches need to be successful to hold on to their jobs.

We will rank which coaches seats are the hottest entering the 2015 season.

Our first volume featured the “safest” coaches for this year and why.

In volume two, we went over the coaches that are likely safe, but not guaranteed.

The third volume featured coaches who are probably safe, but should be concerned if the wheels fall off the wagon. 

In volume four we discussed the coaches who are in a moderate amount of danger of losing their jobs and why. 

In volume five we looked at the coaches who need to show improvement in 2015.

In volume six we looked at the coaches who need their teams to show significant improvement in 2015 to keep their jobs.

Now we finish the countdown with the four coaches that are on the hottest seats entering 2015.

4. Jim Tomsula, San Francisco 49ers

It’s very difficult for a first-year head coach to be this high on the “hot seat list,” especially considering the mass offseason exodus of 49ers defensive players to retirement.  With that said, Jim Tomsula wasn’t on anyone’s short list of the “hottest coaching candidates.”

Right now Tomsula has the support of management, but the 49ers look like a last place team and that’s not going to look good after all the rousing success the team had with Jim Harbaugh.  It’s entirely possible that the whole front office could be swept clean if the Niners can’t get out of last place.

3. Chip Kelly, Philadelphia Eagles

The “smartest man in the room” syndrome seems to apply here.

Chip Kelly has won double-digit games in his first two seasons as Eagles head coach.

So why would he be on the hot seat?

Kelly has micro-managed his team so much that he has jettisoned anyone that doesn’t completely buy in 100 percent.  That includes everything from offseason activities (off the field) to diet.

Since Kelly’s arrival he’s shipped away elite talents which include DeSean Jackson, LeSean McCoy, Evan Mathis and other less talented guys like Todd Herremans and Nick Foles.

Chip Kelly has seized the power and control of the organization and changed everything outside of the logo and colors.  When you’ve changed as much as Kelly has, which was built up by years of good drafting and you fail, you pretty much have to be fired.

Chip Kelly has put himself on an island in Philadelphia and it’s win or else.

2. Lovie Smith, Tampa Bay Buccaneers

Lovie Smith’s Tampa Bay Buccaneers looked like the most unprepared team in the NFL last season and it led to a 2-14 record and subsequently the first-overall pick in the draft.

Most coaches that get a rookie quarterback have a little leeway, but this shouldn’t be the case with Smith. The Bucs looked worse under Lovie than they did at any point under previous head coach Greg Schiano, a coach who was lambasted for “losing his team” (which never actually happened).

Smith has proved in Tampa that he can do the least with the most and another last-place finish should write his pink slip.

1. Joe Philbin, Miami Dolphins

The Miami Dolphins have been a mediocre team under Joe Philbin’s watch.

Not good, not terrible, just mediocre.

With the offseason spending spree and the changes in the Dolphins front office, mediocrity will no longer be tolerated.

Philbin’s teams have struggled down the stretch and they’ve struggled even more in close games.  The embarrassing bullying scandal was on Joe Philbin’s watch as well.

Miami has what they feel to be a franchise quarterback in Ryan Tannehill, along with the most dominant defensive player this side of J.J. Watt in Ndamukong Suh.  If they don’t make the playoffs Joe Philbin will be fired on 1/4/16.