Brad Stevens

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New Boston Celtics coach Brad Stevens reacts to a question during a news conference where he was introduced Friday, July 5, 2013, at the NBA basketball team's training facility in Waltham, Mass. Stevens twice led the Butler Bulldogs to the NCAA title game. He replaces Doc Rivers, who was traded to the Los Angeles Clippers. (AP Photo/Josh Reynolds)

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Butler coach Brad Stevens points at the basket during the first half of Butler's 64-63 win in an NCAA college basketball game against Gonzaga on Saturday, Jan. 19, 2013, in Indianapolis. (AP Photo/AJ Mast)

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Butler head coach Brad Stevens watches his team during a practice for a men's NCAA Final Four semifinal college basketball game Friday, April 1, 2011, in Houston. Butler plays Virginia Commonwealth on Saturday. (AP Photo/Eric Gay)

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Butler head coach Brad Stevens calls out to his team during the first half of the NCAA Southeast regional college basketball semifinal game against Wisconsin Thursday, March 24, 2011, in New Orleans. (AP Photo/Patrick Semansky)

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Butler head coach Brad Stevens looks on during practice for their southeast regional NCAA college basketball game against Old Dominion, Wednesday, March 16, 2011, in Washington. (AP Photo/Nick Wass)

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Butler University head coach Brad Stevens speaks to reporters during open practice at the Verizon Center, in Washington, D.C., Wednesday, March 16, 2011. (Drew Angerer/The Washington Times)

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Butler coach Brad Stevens shouts to his team during the first half of their NCAA college basketball game against Louisville in Louisville, Ky., Tuesday, Nov. 16, 2010. (AP Photo/Ed Reinke)