this success garnered him a job with the nba's boston celtics in 2013, when he signed a six-year, $22-million-dollar contract to become head coach. after undertaking a rebuild early in his career, stevens has led the celtics to the nba playoffs every year since 2015, won a division championship, and appeared in the eastern conference finals in 2017 and 2018. he has gained a reputation as one of the nba's best coaches, with his motion offense and stingy defense earning plaudits from fans, peers, and players.