Larry O'Brien Trophy

And the Boston Celtics left no doubt of their superiority by seizing the franchise's record 18th Larry O'Brien Trophy with one of the most successful post-season stretches of the NBA's modern era, maintaining the level of dominance they displayed while winning a league-best 64 games during the regular season.

Monday's clinical 106-88 victory over the over-matched Dallas Mavericks in Game 5 of the Finals was the fitting conclusion to a stellar play-off run in which the Celtics went 16-3. That winning percentage of .842 is the second-best by an NBA champion since the league moved to a best-of-seven format for all four rounds in 2003, bettered only by the 2017 Golden State Warriors super-team that lost just once during that year's play-offs.

Detractors will be quick to point out Boston's relatively easy path to glory, as they didn't have to face any of the Western Conference's top four seeds in the Finals and also avoided the East's second and third-best teams, the New York Knicks and Milwaukee Bucks, in earlier rounds. 

The numbers suggest it may not have mattered.

Boston finished the regular season with the league's best offensive rating (120.2) and ranked third in defensive rating (109.0), and their 11.2 net rating (the difference between offensive and defensive rating) was the highest by any team since the aforementioned 2016–17 Warriors posted a 12.1 mark en route to capturing their second of three NBA titles within a four-year span.

And the Celtics cruised through the play-offs despite Kristaps Porzingis, one of the team's three 20-point-per-game scorers, missing 12 total games with a leg injury that rendered him to a reduced supporting role for much of the Finals.

So, what were the main factors behind Boston's season-long run of brilliance, one this budding dynasty appears to be fully capable of extending beyond 2024? Here's a closer look:

Three-point markmanship

Head coach Joe Mazzulla's offence is built around the 3-point shot, as the Celtics hoisted up a league-high 3,482 trey attempts during the regular season - 240 more than the next highest team -  and had a staggering 47.1 per cent of their total shots taken from beyond the arc.

If you're taking that many long-distance shots, you better have guys that can make them. And Boston certainly did.

The 2023-24 Celtics became the first team in NBA history with seven players that shot 37 per cent or better from beyond the 3-point line while having 250 or more attempts in a season, and their overall 3-point percentage of .388 ranked second in the league behind only Western Conference regular-season champion Oklahoma City's .389.

And when Boston was hitting its threes, it was virtually unbeatable. The Celtics were 36-1 in the regular season when shooting over 40 per cent from 3-point range, and 8-0 in the post-season when that number was higher than 37.5 per cent.

Disruptive defence

The Celtics also had the NBA's best net rating in 2022-23, a season which memorably ended with a stunning seven-game loss to the eighth-seeded Miami Heat in the Eastern Conference finals. Miami pulled off the upset by beating Boston at its own game, as it shot a scorching 43.4 per cent from 3-point range for the series while the Celtics struggled to a 30.3 per cent success rate.

Dallas, which had the second-highest rate of 3-point shots attempted per total field goal attempts during the regular season at 44.1 per cent, was determined to follow the Heat's blueprint in the Finals, but this Celtics team would have none of it.

The Mavericks made good on over 40 per cent of their shots from beyond the arc in their Game 4 blowout win, but were held under 30 per cent in three of their losses and under 32 per cent overall for the series as Boston's perimeter disruptors - led by six-time All-Defensive Team member Jrue Holiday and Finals MVP Jaylen Brown - put the clamps on Dallas' sensational backcourt duo of Luka Dončić and Kyrie Irving.

Doncic made just 11 of 45 (24.4 per cent) of his 3-point tries for the series, and the ex-Celtic Irving wasn't much better at 27.6 per cent. The Mavericks shot 29.7 per cent as a team from long distance when Holiday was on the court and 29.9 per cent when Brown was in the game.

Dynamic depth

Boston was able to navigate Porzingis' lengthy absence, as well as the shooting struggles of top scorer Jayson Tatum for sizeable portions of the Finals, with relative ease due to strong contribtions from a few of its role players, most notably Al Horford and Sam Hauser.

The 38-year-old Horford stepped into a starting role with Porzingis either unavailable or limited for much of the post-season and handled it with aplomb, especially on the defensive end where the Celtics were a stingier outfit with the grizzled veteran on the court.

Hauser, an undrafted 3-point specialist whose role off the bench steadily increased during the season, made his presence felt as well by going 11 of 23 (47.8 per cent) from beyond the arc for the Dallas series. The Celtics were a plus-17 with him on the court over the five games.

A dynasty brewing?

Under a steady sequence of shrewd moves from former coach turned president of basketball operations Brad Stevens and predecessor Danny Ainge, the Celtics have assembled the NBA's most complete roster and one that has the capability of potentially wreaking havoc for years to come. With Horford hinting at his intentions to return for an 18th NBA season, Boston will have all of its main players back for next season with its core of Tatum, Brown and Porzingis still in their primes. 

Add in a coach in Mazzulla who's still not 36 years old with still room to further perfect his craft, and it's not hard to envision yet another banner or two hanging from the rafters of TD Garden in the near future.