San Antonio is marking a notable shift as Gregg Popovich steps down from his long-standing position, ending his 29-year leadership of the Spurs. This exit represents a significant moment in the NBA that extends into the NFL, subsequently elevating Mike Tomlin of the Pittsburgh Steelers to the longest-tenured coach across the major North American sports leagues.

Tomlin, having spent 19 seasons with the Steelers, was appointed to succeed Bill Cowher—who held the position for a notable 15 years. Since 1969, the Steelers have nurtured consistency with just three coaches overall: Tomlin, Cowher, and Chuck Noll.

In June 2024, Tomlin secured a three-year extension with the Steelers, ensuring his tenure through the 2027 season. Tomlin’s reign solidified post-Popovich, particularly as he took the title of longest-serving coach in the NFL following the departure of Bill Belichick from the New England Patriots after 24 seasons. It’s worth noting that the Steelers have not had a losing season during Tomlin’s eighteen years at the helm, which stands as an NFL record.

In the NBA, Erik Spoelstra of the Miami Heat, who joined in 2008, is now the league’s longest-serving coach, wrapping up his sixteenth season. Like Popovich, Tomlin’s success with the Steelers has been substantial, leading the team to Super Bowl XLIII during the 2008 season and achieving an impressive overall record of 183-107-2 in regular-season matches, alongside an 8-11 playoff performance.