Why do these NFL coaches never lose, even when their teams do?

In the NFL, we often see coaching retreads and guys who seemingly under-performed in one place magically get a job somewhere else and people question why. For every Bill Belichick who went from an awful Cleveland Browns head coach to a sure-fire Hall of Fame New England Patriots legend, there are dozens of other coaches who wash out. Some coaches have had success before and are hanging on to their jobs.

Then there are the other coaches who seemingly can't lose even if their teams do. All of the coaches listed below have had differing levels of success and disappointments but are still roaming the sidelines despite some who feel they need to move on.

Let's look at six head coaches who seem to be wearing Teflon NFL-licensed gear:

Rex Ryan
Rex Ryan seemingly is living off of three things: being a part of that great Baltimore Ravens coaching staff in the 2000s, taking the New York Jets to consecutive AFC Championship games in his first two head coaching seasons and the fact that he has the gift of gab. He is a players' coach.

In Ryan's seven full seasons, he has just one season where he won at least 10 games. He has never won a division title (though, when you live in the AFC East, the Patriots tend to have a monopoly on those). He hasn't taken his teams to the playoffs since the 2010 season. Yet Ryan chugs on, prodding Bill Belichick and making waves when he can.

Ryan is only in his second season with the Bills and is currently 4-5. The team began the season 0-2, won their next four games, then have lost three straight. Bills owners Terrence and Kim Pegula have put pressure on Ryan to have a successful season

Marvin Lewis
Lewis is seemingly a Bengals lifer. After taking over a 2-14 Cincinnati team that had suffered 15 years of bad football, Lewis brought the playoffs back to the Queen City. In the 13 years under Lewis, the Bengals have been to the postseason seven times — including the last five years — which is half of the seasons the Bengals have ever made the playoffs. He's suffered just three losing seasons in those years and has become the winningest coach in Bengals history by nearly double the next guy (Sam Wyche).

Lewis has also failed to win one playoff game. Not one. Thirteen seasons. Seven postseasons. Zero playoff wins with four of those games at home in Paul Brown Stadium. Last season, Cincinnati suffered their most biting playoff loss by losing to the hated Steelers due to a fumble and a couple of personal foul calls when they had victory in their hands. The Bengals' last playoff win was the 1988 AFC Championship game.

So why has Lewis lasted? Well, the organization loves him. In a family run business, Lewis is an outsider that has tremendous power and influence when it comes to roster moves and draft picks. Even fans who question his coaching prowess understand his talent for finding talent. Some would prefer Lewis to get bumped up to the front office full-time and let someone else finish the coaching job, but ownership is all-in on Marvin.

Jeff Fisher
Fisher has been a head coach for 22 years. He did a fantastic job transitioning the Houston Oilers into the Tennessee Titans and playing home games in three cities in three seasons, and is currently transitioning the Rams from St. Louis to Los Angeles. He took the Titans to their first and only Super Bowl. Only nine other coaches in NFL history have more wins than Fisher.

However, in those 22 years there have been zero championships and just that one Super Bowl appearance and three division titles. He's only won five playoff games, with three of them coming in that Super Bowl season, including the Music City Miracle, and the last postseason win was in 2003 when the late Steve McNair was the quarterback. .

In those 22 years, Fisher has had only six winning seasons, yet he's only had four seasons where he lost double-digit games. Fisher's teams are almost the definition of mediocre, as there have been 10 seasons where the Oilers/Titans or Rams won either 7 or 8 games. He is currently in his fifth season as the Rams head coach, and the first four seasons were losing ones (and three were 7-9 campaigns). No coach since the NFL/AFL merger has kept their job after their first four seasons yet Fisher may be getting an extension.

How is this? Well, Fisher is a likable guy and a good coach who gets the most out of subpar rosters. Also, his experience with the Oilers' move to Nashville is helpful with the Rams move to Los Angeles and their current temporary housing situation. He's also done a decent job this season with a Rams roster that doesn't wow anyone, but what can the newly-returned Rams reasonably expect with his record?

Jason Garrett
There have been many eyes rolling over Jason Garrett. Garrett took over the Dallas Cowboys midway during the 2010 season after the team fired Wade Phillips, taking a 1-7 team and winning 5 of the final 8 games and earning the full time gig. In the five full seasons since, he has had three 8-8 records, a 12-4 mark and a 4-12 season. He has taken the Cowboys to the playoffs just once, winning Dallas' second playoff game since the 1996 season.

Think about this: Only Tom Landry has coached the Cowboys longer than Garrett.

Yet Phillips, who Garrett replaced, took the Cowboys to two NFC East titles in his three full seasons and was fired. Phillips had a 34-22 record with Dallas (Garrett was 45-43 heading into this season) and was constantly mocked and eventually removed as head coach. Heading into this season, only Dave Campo had a worse record than Garrett in Cowboys' history. Yet Garrett is armed with a five year extension he signed in 2015 and after the success of this season, doesn't seem to be going anywhere.

Jerry Jones' patience with Garrett is paying off this season. With the help of rookies Ezekiel Elliott and Dak Prescott the Cowboys are 8-1 and hold the NFL's best record. Is it because of Garrett or because of the rookies? That can be debated, but in Jerry's World, Garrett is a protected man.

Mike Tomlin
You'd think Mike Tomlin shouldn't belong on this list. During his 10-year head coaching career with the Steelers, he's never had a losing record and taken Pittsburgh to six postseasons and two Super Bowls, including the Super Bowl XLIII championship. Including this season, Tomlin is 96-57 during the regular season.

Still, there are those in Pittsburgh that haven't been satisfied with Tomlin. They feel the Steelers have too much swagger yet fold in too many games for their liking. They point to the fact that Tomlin's Super Bowl victory came from Bill Cowher's work and that they once lost a playoff game to Tim Tebow. His confidence can be seen as arrogance, his teams have been labeled as unprepared and the staple tough defense hasn't been so tough lately. He has also been seen by some as having an ego that gets the best of him, like when he interfered with the Ravens' Jacoby Jones' kick return on Thanksgiving Day in 2013.

The Steelers don't roll over on their coaches. Tomlin is just the third Steelers coach since 1969 and the other two had some less than stellar seasons. Chuck Noll's final seven years weren't very good and Cowher had a couple of lean years but the Rooney family doesn't lose their cool. While there are times when fans question Tomlin's play-calling or decisions, his players love his confidence in them and play hard for him. Tomlin is safe as long as they continue to be in the mix ... which they certainly are.

Mike McCarthy
McCarthy? Really? I mean, the Packers' 10 full seasons under McCarthy have resulted in eight playoff appearances, 104 wins and a Super Bowl title. Why should he be getting a tough time?

Well, the Packers lost just one home playoff game in their history prior to 2006, McCarthy's first season. In the McCarthy era, they have lost three home playoff games. They are 0-3 in overtime playoff games under McCarthy, including last season's wild finish against the Cardinals. They folded against the Seahawks in the 2013 NFC Championship game. There was actually some chatter that McCarthy's job could be in jeopardy last offseason.

Green Bay still may move on this. McCarthy and Aaron Rodgers' relationship has been souring and if there needs to be a separation of the two, it won't be A-Rodg leaving.