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Just looking at recent history shows that this is arguably the most important factor in building a championship team.
The Ravens weren't going to fire John Harbaugh if he didn't win the Super Bowl, but questions would have continued to linger after a fifth consecutive postseason trip without reaching pro football's mountaintop.
As for the coaches that preceded Harbaugh, New York Giants head coach Tom Coughlin's job seems to always be on the line. Yet he's a two-time world champion coach for that franchise.
Mike McCarthy endured four seasons and notched only one playoff victory in that span before the Green Bay Packers got hot at the end of 2009 and translated it to a title run as a wild card.
After facing a lot of pressure to succeed fellow SB-winning coach Bill Cowher in Pittsburgh, it took Mike Tomlin only three years to get the Steelers back to the promised land.
Sean Payton led the New Orleans Saints to the NFC Championship game in his first season, but missed the playoffs the next two years. The organization stuck with him, and the Saints beat the Indianapolis Colts in Super Bowl XLIV.
After a 5-11 campaign to open his New England tenure, Bill Belichick guided the Patriots to three championships in four years.
Prior to the Greatest Show on Turf, Dick Vermeil won just nine games combined in his first two seasons with the St. Louis Rams. Then, the preseason injury to Trent Green and arrival of Kurt Warner changed everything, as the Rams went on a magical 13-3 run in 1999 and won the Lombardi Trophy thereafter.
In order for things to transition smoothly, it is all about the proper fit. Having a front office regime and a head coach that are on the same page is absolutely essential. That gives the coach more time to implement his plan, and creates a stable environment within the organization.
If the list of championship coaches is any indication, it typically takes years for a coaching staff to get players to fully buy in—to the point of being able to become Super Bowl contenders, and eventual champions.