At the end of every NFL season there is turnover. Unlike any other business on the planet, the NFL is strictly a results-matter business and players and head coaches alike, lose jobs at the conclusion of every season for poor performance.

One good season is only as good as that season.

History matters very little, in an era of free agency and "what can you do for me now?" Take Lovie Smith for example. Smith was the head coach of the Chicago Bears for nine seasons. He was fired at the end of this season for finishing 10-6 and not making the playoffs.

We have come to a point where winning simply isn't good enough. Owners want to see their teams in the playoffs every year and they want to know that their team has a chance to win. All 32 teams have the same goal at the start of the season, win the Super Bowl. For a select few teams -- Patriots, Ravens, Giants, Packers -- this goal is a lot more realistic than it is to others.

When you look at the franchises that are a model of consistency, you will see they all have one thing in common. They have tenure and consistency at the head coaching position.

Since 2000, the Patriots' Bill Belichick. Steelers' Mike Tomlin, Giants' Tom Coughlin, Packers' Mike McCartney, Ravens' John Harbaugh, Bengals' Marvin Lewis and up until just recently the Eagles' Andy Reid all have had multiple seasons of playoff appearances and wins.

The opposite of consistency is Cleveland. Since the Browns returned to the league in 1999, they have burned through six head coaches and are ushering in No. 7 this season. With new owner Jimmy Haslam taking over the team mid-season, it was inevitable that the Browns would be in the head coaching market again.

They brought back Rob Chudzinski, who worked with the Browns in 2007 and 2008 as the offensive coordinator. In 2007 under Chudzinski, the Browns had their most productive offensive season since 1994. They ranked eighth in points and yards.

Chudzinski was most recently the offensive coordinator with the Carolina Panthers and Cam Newton. The Panthers were able to put up big numbers on offense, but it didn't equate to enough wins. How will Chudzinski fair this season in Cleveland?

There were eight teams that fired their head coach, assistant coaches and/or general manager at the end of the 2012 regular season. Of those eight teams -- Arizona, Buffalo, Chicago, Cleveland, Jacksonville, Kansas City, Philadelphia and San Diego -- only Arizona remains without a head coach. Look for them to have one signed by the end of the week.

Andy Reid was the first to find a new team. He had been the longest tenured coach until Philadelphia relieved him of his services. He will now wear the red and yellow and patrol the sidelines of Arrowhead Stadium. The Chiefs have the No. 1 pick in this year's Draft. Will Reid use it on a quarterback?

Find out who will have the biggest impact with their new team. How will Chip Kelly replace Reid and will his system fit in with the Philadelphia Eagles? Will he keep Michael Vick, or is Nick Foles still in the plans?