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Indiana Pacers head coach Nate McMillan signals to his players during the second quarter against the Cleveland Cavaliers during a preseason NBA basketball game, Monday, Oct. 8, 2018, in Cleveland. (AP Photo/Scott R. Galvin).
FILE - In this March 14, 2018, file photo, Golden State Warriors coach Steve Kerr gestures in front of Stephen Curry during the second half of the team's NBA basketball game against the Los Angeles Lakers in Oakland, Calif. Kerr understands the NBA's business side, free agency and everything it takes to build a perennial winner with a star-studded roster like the one he gets to coach every day. He knows what these Warriors have now will hardly last forever (AP Photo/Ben Margot, File)
San Antonio Spurs coach Gregg Popovich stands on the sideline during the first half of a preseason NBA basketball game against the Atlanta Hawks in Atlanta, Wednesday, Oct. 10, 2018. (AP Photo/Danny Karnik)