Brad Stevens says he had no desire to leave Butler — until the Celtics called.
Boston introduced its new 36-year-old coach, and general manager Danny Ainge says Stevens was his first choice to replace Doc Rivers.
Stevens says coaching the Celtics is "an incredible honor and it's certainly flattering."
Boston received a first-round draft pick from the Los Angeles Clippers for the rights to Rivers.
Stevens says he has already reached out to Celtics star point guard Rajon Rondo. Boston is in rebuilding-mode and Rondo is coming off a major knee injury.