https://www.nba.com/news/erik-spoelstra-longest-tenured-active-coach-major-us-sports
Heat's Erik Spoelstra is longest-tenured coach in US sports
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https://www.sbnation.com/nfl/1098969/nfl-longest-tenured-head-coaches-list-after-john-harbaughs-firing
NFL’s longest-tenured head coaches after Mike Tomlin steps down from Steelers | SB Nation
Jan 13, 2026 - Analyzing the new list of longest-tenured NFL head coaches now that Mike Tomlin and John Harbaugh are out.
mike tomlin stepshead coaches