NFL's longest-tenured head coaches with John Harbaugh out in Baltimore

There's an old saying about what NFL means for players and coaches who fail to meet expectations – Not For Long.

While there's a short list of coaches with real staying power, the ranks of longest-tenured NFL head coaches is being rearranged this week, most notably after the Baltimore Ravens on Jan. 6 fired John Harbaugh, ending the Super Bowl-winning coach's 18-year run with the franchise.

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Harbaugh's tenure was second-longest among active NFL coaches, behind only Mike Tomlin of the Pittsburgh Steelers. Tomlin is preparing the Steelers for an AFC wild-card showdown against the Houston Texans on Jan. 12 after Ravens kicker Tyler Loop missed the potential game-winning kick in the Steelers' 26-24 win over the Ravens that clinched the AFC North title on Jan. 4.

Tomlin hasn't been immune to calls for the Steelers to part ways with their longtime coach this season, but that conversation will be shelved as long as the Steelers remain Super Bowl contenders.

For now, here's a look at the longest-tenured NFL coaches, which aside from Harbaugh was also changed by the Cleveland Browns' firing of Kevin Stefanski (six years in Cleveland) on Jan. 5, this year's "Black Monday."

For those wondering, Curly Lambeau in Green Bay (1921-49) and Tom Landry in Dallas (1960-88) are tied for the longest tenure leading one team at 29 seasons.

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1. Mike Tomlin, Pittsburgh Steelers

• Age: 53

• Number of seasons: 19

• Record with Steelers (through 2025 regular season): 193-114-2 (.628)

2. Andy Reid, Kansas City Chiefs

• Age: 67

• Number of seasons: 13

• Record with Chiefs: 149-64 (.700)

T3. Sean McDermott, Buffalo Bills

• Age: 51

• Number of seasons: 9

• Record with Bills: 98-50 (.662)

• Playoff berths: 8

T3. Sean McVay, Los Angeles Rams

• Age: 39

• Number of seasons: 9

• Record with Rams: 92-57 (.617)

T3. Kyle Shanahan, San Francisco 49ers

• Age: 46

• Number of seasons: 9

• Record with 49ers: 82-67 (.550)

T6. Matt LaFleur, Green Bay Packers

• Age: 46

• Number of seasons: 7

• Record with Packers: 76-40-1 (.654)

• Playoff berths: 6

T6. Zac Taylor, Cincinnati Bengals

• Age: 42

• Number of seasons: 7

• Record with Bengals: 52-63-1 (.453

T8. Dan Campbell, Detroit Lions

• Age: 49

• Number of seasons: 5

• Record with Lions: 48-36-1 (.571)

• Playoff berths: 2

T8. Nick Sirianni, Philadelphia Eagles

• Age: 44

• Number of seasons: 5

• Record with Eagles: 59-26 (.694)

T10. Mike McDaniel, Miami Dolphins

• Age: 42

• Number of seasons: 4

• Record with Dolphins: 35-33 (.515)

• Playoff berths: 2

T10. Todd Bowles, Tampa Bay Buccaneers

• Age: 62

• Number of seasons: 4

• Record with Buccaneers: 35-33 (.515)

• Playoff berths: 3

This article originally appeared on USA TODAY: Who is NFL's longest-tenured head coach? It's still Mike Tomlin