Brad Stevens says he's in awe of the Boston Celtics organization as ex-Butler coach is introduced as the 17th head coach in franchise history on Friday.  WALTHAM, Mass. – When Celtics president Danny Ainge first contacted coach Brad Stevens on June 25, Stevens and his wife Tracy, also his agent, were in the throes of hosting a youth basketball camp inside Hinkel Fieldhouse at Butler University.  "We were talking about concessions or something important like that," Tracy said.  Ainge broached an entirely different business proposition with her husband.  A fan from afar who watched in person as Stevens brought Butler to the brink of a national championship in 2010, Ainge initiated the process to bring Stevens in as the replacement for Doc Rivers. Ten days later, Stevens, 36, was introduced as the youngest coach in the NBA at the Celtics suburban training facility in a gym decorated with 17 championship banners.  He expressed optimism about leading the franchise through a rebuilding process.  "I'm just in awe of the Boston Celtics," Stevens said. "I'm absolutely humbled to be sitting in this room."  RELATED: CELTICS SHOCK NBA BY HIRING BUTLER'S STEVENS  Stevens' ascension has been a study in efficiency. In six years as head coach at Butler his teams won 166 games, never won fewer than 22 contests in a season and twice lost in the national championship game, first to Duke, then to UConn. Suitors followed, ranging from UCLA to Illinois, but Stevens stayed put until the Celtics offered the six-year contract worth $22 million.  "Brad was my first choice," Ainge said. "I have watched and admired his poise, his intelligence, his teams, their effort, their execution under pressure. I've always looked at him the last few years as a guy that was a great candidate to be a head coach, never really thinking it was going to be this soon in Celtics history but is a guy that I have targeted for a long time as a potential great head coach."  Stevens arrives at a transitional time for the celebrated franchise. Forwards Paul Pierce and Kevin Garnett were recently traded to the Brooklyn Nets and coach Doc Rivers was allowed to join the Los Angeles Clippers in exchange for a first-round draft pick.  Ainge insisted that Stevens's wife was a large part of the deal. He joked about bringing her on as counsel for the team, but also noted that she had to leave the final meeting before the contract was signed. Back at basketball camp, there was a problem with the toilets. She excused herself, then departed to figure out a solution.  Ainge sent her a text message.  "You won't have to worry about toilets with the Boston Celtics," he said.
Brad Stevens says he had no desire to leave Butler — until the Celtics called. Seventeen championships. Bill Russell. Red Auerbach. It was all too much for the 36-year-old Stevens to resist.