Boston Celtics (1969–1978) Heinsohn became the Celtics' head coach beginning in the
1969–70 season, following
Bill Russell's retirement as both player and coach. Initially, the team missed Russell's impact, and the Celtics struggled in both 1969–70 and
1970–71, failing to reach the playoffs in both seasons. The team broke through the
following season, making the conference finals. Heinsohn then led the team to a league-best 68–14 record during the
1972–73 season and was named
Coach of the Year, although Boston was upset in the
playoffs by the eventual champion
New York Knicks. To date, this is the best regular season record in Celtics history. The
next season Heinsohn and the Celtics
won the championship, and they claimed another title in
1976. Between 1971–72 and 1975–76 seasons, the Celtics would win at least 50 games a season. The team would take a step back in the
1976–77 season, finishing 44–38, and was eliminated in the second round of the playoffs. He was selected as the
NBA All Star game coach 4 times in 1972-1974 and one more time in 1976. The Celtics started poorly in the
1977–78 season, and were 11–23 after a loss to the
Chicago Bulls in late December. Heinsohn would leave the team shortly thereafter, replaced by his former teammate and coaching assistant
Tom "Satch" Sanders. He accumulated a career coaching record of 427–263. On February 14, 2015, it was announced that Heinsohn would be inducted into the Basketball Hall of Fame for a second time as a coaching inductee. He is one of five members of the class of 2015 who were directly elected and is just one of four people to be inducted as both a player and coach. ==Broadcasting career==