I just thought this list was interesting given how we think of Brad as both a young - and new - coach.
Ranking of coaches based on tenure:
1. Gregg Popovich, Spurs: December 1996
2. Erik Spoelstra, Heat: April 2008
3. Rick Carlisle, Mavericks: May 2008
4. Frank Vogel, Pacers: January 2011 (interim; permanent since July 2011)
5. Kevin McHale, Rockets: June 2011
6. Dwane Casey, Raptors: June 2011
7. Randy Wittman, Wizards: January 2012 (interim; permanent since June 2012)
8. Terry Stotts, Trail Blazers: August 2012
9. Jeff Hornacek, Suns: May 2013
10. Mike Budenholzer, Hawks: May 2013
11. Steve Clifford, Hornets: May 2013
12. Dave Joerger, Grizzlies: June 2013
13. Doc Rivers, Clippers: June 2013
14. Brad Stevens, Celtics: July 2013
15. Brett Brown, Sixers: August 2013
16. Stan Van Gundy, Pistons: May 2014
17. Steve Kerr, Warriors: May 2014
18. Flip Saunders, Timberwolves: June 2014
19. Quin Snyder, Jazz: June 2014
20. Derek Fisher, Knicks: June 2014
21. David Blatt, Cavs: June 2014
22. Jason Kidd, Bucks: July 2014
23. Lionel Hollins, Nets: July 2014
24. Byron Scott, Lakers: July 2014
25. George Karl, Kings: February 2015
26. Billy Donovan, Thunder: April 30, 2015
27. Scott Skiles, Magic: May 29, 2015
28. Alvin Gentry, Pelicans: May 31, 2015*
29. Fred Hoiberg, Bulls: June 2, 2015
30. Michael Malone, Nuggets: June 15, 2015
http://www.hoopsrumors.com/2015/08/longest-tenured-nba-head-coaches.htmlFWIW, here is my "hot seat" list:
George Karl - the noise continues out of Sactown viz. Boogie
Dwane Casey - I think he was lucky to survive last year, and I anticipate this year will be one of
under-achievement for Toronto
Byron Scott - an easy and obvious scape-goat for another playoff-less season
Flip Saunders - based on illness and dual job