It's the end of an era in San Antonio as head coach Gregg Popovich steps down from the role after 29 seasons leading the Spurs. While this is a seismic development in the NBA, it also has ramifications that bleed into the NFL as well.

With NBA legend Gregg Popovich stepping away from coaching duties, Mike Tomlin of the Pittsburgh Steelers now holds the title of the longest-tenured head coach across the four major North American sports leagues.

With San Antonio Spurs head coach Greg Popovich stepping down, Pittsburgh Steelers head coach Mike Tomlin will take his place atop an impressive leaderboard.