Question: For the 2004-05 Boston Celtics season, the team hired a coach who was known for his what while he played in the NBA?

The 1995–96 NBA season was the 50th season for the Boston Celtics in the National Basketball Association.  A new era began for the Celtics as they moved into a state of the art new arena known as the Fleet Center.  The team hired M.L. Carr as head coach and signed free agent Dana Barros, who won the Most Improved Player award the previous season with the Philadelphia 76ers.  Early into the season, they traded Sherman Douglas to the Milwaukee Bucks for Todd Day and Alton Lister as they played around .500 with a 12–12 start.  However, the magic was clearly gone for the Celtics as they lost 15 of their next 18 games, finishing fifth in the Atlantic Division with a 33–49 record.  Dino Radja led the team in scoring with 19.7 points per game, but was out for the remainder of the season with an ankle injury after 53 games.  Following the season, second-year center Eric Montross was traded to the Dallas Mavericks. <SEP> The 1946–47 Boston Celtics season was the first season of the Boston Celtics in the Basketball Association of America (BAA/NBA).  Walter A. Brown was the man who was responsible for starting the franchise.  On an early June day in 1946, Brown, who operated the Boston Garden arena and was part of the National Hockey League's Boston Bruins, was the driving force behind the Basketball Association of America and the Celtics birth.  After considering several team names, including Whirlwinds, Unicorns and Olympics, Brown opted for Celtics.  He hoped to grab the attention of Boston's large Irish American population.  John Davis "Honey" Russell was hired as the first Celtics coach, and the team soon began its inaugural season, losing its first game 59–53 to the Providence Steamrollers.  Although the Celtics would eventually become the signature franchise of the NBA, the club had a lacklustre first season as they started with 0 wins and 5 losses.  The Celtics won their first game of the season against the Toronto Huskies. <SEP> The 2004–05 NBA season was the 59th season for the Boston Celtics in the National Basketball Association.  During the offseason, the Celtics acquired All-Star guard Gary Payton, and former Celtics forward Rick Fox from the Los Angeles Lakers, but Fox would retire before the season.  The season is memorable when the team hired Doc Rivers to be their head coach for the upcoming season.  The Celtics struggled playing under .500 for the first half of the season.  At midseason, Payton was traded to the Atlanta Hawks for former Celtic All-Star forward Antoine Walker.  However, Payton would never suit up for the Hawks and was released shortly after.  He then re-signed with the Celtics afterwards for the remainder of the season.  The team went on a 7-game winning streak in March, finishing first place in the Atlantic Division with a 45–37 record.  Paul Pierce was selected for the 2005 NBA All-Star Game. <SEP>  As an NBA point guard, Rivers was known for his defense. Glenn Anton "Doc" Rivers (born October 13, 1961) is an American basketball coach and former player.  He is the current head coach for the Los Angeles Clippers.