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?
Context: The Los Angeles Lakers are an American professional basketball team based in Los Angeles, California.  They play in the Pacific Division of the Western Conference in the National Basketball Association (NBA).  The Lakers' franchise was founded in 1947 in Detroit, Michigan before moving to Minneapolis, Minnesota, where the team got its official title from the state's nickname, "Land of 10,000 Lakes".  The Minneapolis Lakers won five NBA Finals before relocating to Los Angeles in the 1960–61 NBA season, becoming the first West Coast team in league history.  In the 1960s, the Lakers reached the NBA Finals six times, but lost every series to the Boston Celtics, beginning their long and storied rivalry.  In 1972, with future Hall of Famers Wilt Chamberlain, Gail Goodrich, and Jerry West, the Lakers compiled a 33-game winning streak, the longest streak in U.S. professional team sports, and won their sixth title under coach Bill Sharman.  The Lakers' popularity soared in the 1980s when they won five additional championships during a nine-year span with the help of Hall of Famers Magic Johnson, Kareem Abdul-Jabbar, James Worthy and coach Pat Riley, the franchise's all-time leader in both regular season and playoff games coached and wins.  Two of those championships during that span were against their arch-rivals, the Boston Celtics.  With the team of Shaquille O'Neal, Kobe Bryant, Toby Tincher, and Hall of Fame coach Phil Jackson, the Lakers played in four of the first five NBA Finals of the 21st century; winning three consecutively from 2000 to 2002, and losing the fourth in 2004.  The Lakers would then conclude the decade with three straight Finals appearances; losing to the Boston Celtics in 2008 but then prevailing with back-to-back championships against the Orlando Magic in 2009 and the Boston Celtics in 2010.  The 2010 championship marks the 16th NBA championship in Lakers franchise history. The 2009–10 Boston Celtics season was the 64th season of the Boston Celtics in the National Basketball Association (NBA).  The Celtics finished with a record of 50–32, a 12 win drop off from the previous season.  They finished 1st in the Atlantic Division and 4th in the Eastern Conference.  The Celtics made it back to the NBA Finals after a one-year hiatus and played against the Los Angeles Lakers.  Facing a rematch of the 2008 NBA Finals, in which the Celtics defeated the Lakers in six games to capture their seventeenth championship, the Celtics were defeated this time in seven games. 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.  As an NBA point guard, Rivers was known for his defense. The 2008–09 Boston Celtics season was the 63rd season of the Boston Celtics in the National Basketball Association (NBA), starting out as the defending NBA champions.  The Celtics started the season 27–2, which surpassed a mark set by the 1966–67 Philadelphia 76ers for the best two-loss start in NBA history.  This run also included a 19-game winning streak, which improved a Celtics franchise record set in 1981–82.  However, the Celtics lost seven out of the following nine games, and eventually finished with a 62–20 record. The 2004–05 NBA season was the 59th season for the Boston Celtics in the National Basketball Association.  The season is memorable when the team hired Doc Rivers to be their head coach for the upcoming season.  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 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. The 2007–2008 Boston Celtics season was the 62nd season of the Boston Celtics in the National Basketball Association (NBA).  Powered by the acquisitions of perennial All-Stars Kevin Garnett and Ray Allen in the offseason, the Celtics finished with a record of 66–16 and posted the best single-season turnaround in NBA history.  They finished first in both the Atlantic Division and the Eastern Conference, and achieved the league's best record.  The 66 wins were also the third-most in franchise history, behind the 1972–73 Celtics’ 68 wins and the famous 1985–86 Celtics’ 67 wins including 40 at home.  Kevin Garnett was named NBA Defensive Player of the Year, while Danny Ainge, who executed "the most dramatic NBA turnaround ever", was named NBA Executive of the Year.  The Celtics also sold out all 41 regular-season home games. The 1988–89 Boston Celtics season was the 43rd season of the Boston Celtics in the National Basketball Association (NBA).  This was the first season for Jim Rodgers as head coach.  Rodgers had been a Celtics assistant coach prior to this season.  This year's Celtics team was severely hindered by the loss of star forward Larry Bird to a heel injury which required surgery.  Bird played only six early-season games before being lost to injury.  Initially, Bird was expected back in March, but it was delayed and ultimately became a season-ending injury.  The results were dramatic as the Celtics, who had averaged over 60 wins per season thus far in the 1980s, fell to just 42 wins in this season.  Coming into the season, the Celtics had been the Eastern Conference's #1 seed five years in a row.  This season they were the #8 seed, clinching a playoff spot in the season's final game.  This season included some bright spots, particularly the emergence of guard Reggie Lewis, who had been only a minimal bench contributor in his rookie season of 1987-88, but averaged nearly 20 points per game as a starter in 1988-89. 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. 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. The 2012–13 Boston Celtics season was the 67th season of the franchise in the National Basketball Association (NBA).  The Boston Celtics finished the regular season with a 41–40 won-loss record, which was the 3rd best in the Atlantic division, bringing an end to the 5-year run as Atlantic Champs and 7th best in the East.  Their longest winning and losing streaks were 7 and 6 games respectively.  The leading scorer was Paul Pierce, averaging 18.6 PPG.  The leading rebounder was Kevin Garnett (7.8 RPG).  Rajon Rondo led the team and the league in assists per-game with 11.1 despite only playing 38 games due to ACL injury.  The Celtics only played 81 games as their April 16 game was cancelled in the aftermath of the Boston Marathon bombing and was not rescheduled because it would not have changed any part of the final Eastern Conference standings anyway.  The Celtics would go on to lose in the first round of the playoffs for the first time since the 2004–05 season.  This season would mark the end of the Paul Pierce and Kevin Garnett era in Boston as they were traded to the Brooklyn Nets during the 2013 off-season.
Answer: defense