Three degrees of Gregg Popovich: The coaching tree that connects the entire NBA

Head coaches Gregg Popovich of the San Antonio Spurs and Steve Kerr of the Golden State Warriors talk at the end of the game at Frost Bank Center on March 11, 2024 in San Antonio, Texas. (Photo by Ronald Cortes/Getty Images)Ronald Cortes via Getty ImagesA decade ago, when a number of NBA coaches lauded Gregg Popovich for the willingness to welcome newcomers to his fraternity, Frank Vogel called the San Antonio Spurs coach the league's "godfather."How true that remains in 2025. Popovich's fingerp