The Boston Celtics share their coaches with a hockey team.
Boston Celtics . The Celtics play their home games at the TD Garden , which they share with the National Hockey League ( NHL ) 's Boston Bruins . After the end of the second `` Big Three '' era , general manager Danny Ainge began a rebuilding process with the help of new head coach Brad Stevens , who led the Celtics to a return to the playoffs in 2015 , 2016 , and 2017 .