Gregg Popovich's historic tenure as the head coach of the San Antonio Spurs has officially come to an end, marking nearly 29 years of remarkable leadership and success in the NBA. His retirement has made way for Mike Tomlin, head coach of the Pittsburgh Steelers, to take the title of the longest-tenured coach among the four major U.S. sports leagues.

Popovich's career has set numerous records, including being the all-time leader in coaching victories, amassing 1,422 wins in the regular season. The league has seen significant coaching turnover during his tenure, with an average of over 10 changes per team since he started. Meanwhile, Erik Spoelstra, now the longest-serving coach in the NBA, will need to perform at an exceptional level to even approach Popovich’s legacy.