Tommy Heinsohn's legacy with the Boston Celtics is profound, marking him as a true icon in the franchise's history. As a player, he secured eight championships during his tenure from 1956 to 1965, becoming a pivotal figure in the Celtics' dynasty. Transitioning into coaching, he led the team to two more titles in the 1970s after taking the reins from Bill Russell. Beyond the court, Heinsohn excelled as a broadcaster and painter, showcasing his diverse talents. His contributions to the Celtics are commemorated through his induction into the Hall of Fame in 2015, where he remains a celebrated figure.

Heinsohn's influence extended beyond his playing and coaching days, as his charismatic commentary alongside Mike Gorman brought the excitement of Celtics basketball to fans for decades. His unique perspective and passion for the game made him a cherished voice in Boston sports. His artistry also reflected his love for the game, illustrating the multifaceted nature of his contributions to basketball. The Celtics honor his memory and impact, ensuring that his legacy lives on in the hearts of fans.

The Boston Celtics have a rich history that includes a remarkable total of 68 different jersey numbers worn by over 500 players since the team's inception in the BAA. Among these, the No. 20 jersey is especially significant, as it was sported by Hall of Famer Tommy Heinsohn during his illustrious career with the Celtics. Drafted sixth overall in 1956, Heinsohn played nine seasons with Boston, winning eight championships and achieving outstanding averages of 18.6 points, 8.8 rebounds, and 2.0 assists per game. His contributions were pivotal in establishing the Celtics as a dominant force in basketball.

The legacy of the No. 20 jersey is a testament to Heinsohn's impact both on and off the court, making it a symbol of excellence within the Celtics organization. As one of only 25 jerseys retired by the team, it honors not just Heinsohn's achievements, but also his enduring connection to the Celtics community, solidifying his place among the franchise’s greatest legends.