The result was the most dominant Celtics championship run since 1965, with only three losses in the playoffs and a season total of 80 wins, the second-best mark in franchise history.
[7] On March 14, 2024, the Celtics became the first team to clinch a playoff berth with their 117–107 victory over the Phoenix Suns and the Philadelphia 76ers' 114–105 loss to the Milwaukee Bucks.
Six days later, the Celtics won the Atlantic Division championship for the third consecutive season, following a 122–119 victory over the Bucks during a 7-game winning streak.
On April 3, 2024, the Celtics defeated the Oklahoma City Thunder with a 135–100 victory, clinching the best record in the NBA and securing a home-court advantage throughout the entire playoffs for the first time since 2008.
The Celtics finished the season with a 64–18 record, 14 games higher than the second-place team in the Atlantic Division and the entire Eastern Conference, the New York Knicks.
[11][12] During the in-season tournament period, the Celtics played in Group C of the Eastern Conference with the Brooklyn Nets, Toronto Raptors, Chicago Bulls, and Orlando Magic.