Question: What Texas head coach had the longest-tenured position in all major sports leagues?
Answer: Gregg Popovich
Gregg Popovich’s 29-season tenure with the San Antonio Spurs is the longest head coaching stint with a single team in the history of all four major U.S. sports leagues (NFL, NBA, MLB, NHL). He is not just the longest-tenured coach in Texas sports history, but across all of American professional sports.