Brad Stevens

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Boston Celtics head coach Brad Stevens reacts in the first half of an NBA basketball game against the Memphis Grizzlies, Tuesday, Dec. 20, 2016, in Memphis, Tenn. (AP Photo/Brandon Dill)

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Brad Stevens is in his second season as coach of the Boston Celtics after leading Butler to two Final Fours.

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Virginia Commonwealth coach Shaka Smart (left) and then-Butler coach Brad Stevens were considered the hottest young coaches on the market after meeting in the 2011 Final Four. (Associated PRess)

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Boston Celtics coach Brad Stevens watches his players during the first quarter of an NBA basketball game against the Brooklyn Nets, Friday, March 7, 2014, in Boston. (AP Photo/Charles Krupa)

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Boston Celtics head coach Brad Stevens looks at scoreboard in the second quarter of an NBA basketball game against the Utah Jazz, Monday, Feb. 24, 2014, in Salt Lake City. (AP Photo/Rick Bowmer)

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Boston Celtics coach Brad Stevens watches as his team plays defense against the San Antonio Spurs during the first half of an NBA basketball game in Boston, Wednesday, Feb. 12, 2014. (AP Photo/Stephan Savoia)

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Boston Celtics coach Brad Stevens watches his players during the first quarter of an NBA basketball game against the Oklahoma City Thunder in Boston, Friday, Jan. 24, 2014. (AP Photo/Charles Krupa)

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Boston Celtics coach Brad Stevens talks to his players during the first half of an NBA basketball game against the Golden State Warriors on Friday, Jan. 10, 2014, in Oakland, Calif. (AP Photo/Marcio Jose Sanchez)

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Boston Celtics head coach Brad Stevens calls to his players during the first quarter of an NBA basketball game against the New Orleans Pelicans, Friday, Jan. 3, 2014, in Boston. (AP Photo/Charles Krupa)