Three areas the Celtics should focus on instead of the officials

Do we understand the Celtics’ frustrations? Absolutely. Brown has relentlessly attacked the basket this season and doesn’t seem to get the same friendly whistle that many superstars generate. Mazzulla knows better than anyone that Monday’s loss did not hinge solely on Siakam’s questionable screen, but likely used it as a means to join Brown’s bigger battle for whistle equality.

Sometimes you have to be your own advocate. Brown has not been bashful about voicing his mind this season. Mazzulla lives to make others uncomfortable. Our only quibble would be that, after three vent sessions in six days (all following losses), the gripes land a bit like sour grapes for a team that had otherwise been one of the league’s feel-good stories to start the season.

Time will tell if Boston’s cries leads to better whistles. In calling out a referee and his crew by name after Saturday’s loss, Brown has most certainly caught the attention of the referee fraternity.

Mazzulla’s “illegal screen” reply to every postgame question spread quickly on social media and might have been a clever way to express dissatisfaction without losing any money from his wallet. We doubt any admission of a missed call in the Last 2 Minute report will make Mazzulla feel any better.

But the referees are far from Boston’s only concern after dropping three of its last four. The Celtics were cruising after winning nine of 10 while storming into the new calendar year, then endured consecutive defeats for the first time since mid-December with losses to San Antonio and Indiana.

It’s probably time for Boston to put the focus back on itself.

Mazzulla has famously stated, “When you decide you want to win at something, you don’t get to pick the environment. You don’t get to pick the circumstances. The only thing you get to pick is how you respond.” He’s typically been a firm believer in controlling what you can control.

It’s time for the Celtics to put their energy into their play and not what the referees are calling (or not calling, in this case).

Here are three areas the Celtics need to tighten up, regardless of whether their whistle gets better or not:

1. Opponent 3-pointers

Starting with the 2007-08 title campaign, the Celtics have ranked in the top 10 in opponent 3-point percentage in 17 of the past 18 seasons. The wonky 2020-21 COVID season is the only outlier in that group — until this season.

The 2025-26 Celtics rank 23rd in the NBA in opponent 3-point percentage, with opponents shooting 37 percent beyond the arc. What’s more, Boston ranks 26th in opponent 3-point makes (14.4 per game). Zoom in on the past 10 games, and Boston ranks 29th while allowing 15.9 opponent 3-pointers per game.

The Celtics watched the Nuggets make five more 3-pointers than them last Wednesday. The Raptors were +4 on 3-pointers on Friday (only offset by Boston’s dominance in the paint), and the Pacers were +7 in Indy. Spotting the opponent 21 points on 3-point makes is tough, particularly in a game where both teams failed to reach triple digits.

Despite their lack of size, the Celtics have done a good job limiting opponents near the basket. But opponents seem way too comfortable shooting from the perimeter. Each night, Celtics fans are scrambling to rosters to see which random opponent is catching fire from deep.

The Celtics have to find the right balance between protecting the basket and hunting rebounds, while not giving opponents as much space to fire away from distance.

2. Clutch stumbles

The Celtics are now 8-12 in clutch games (score within five points in the final five minutes). They rank 27th in clutch defensive rating (123.6) and 25th in net rating (minus-13.5). It’s not a terribly large sample size at 56 total minutes, but Boston has certainly not played its crispest basketball in those moments.

Operating without Jayson Tatum and — on nights like Monday, without Jaylen Brown — obviously adds a layer of complexity to late-game situations. Boston is 5-8 in one-possession games in the final minute. Its offense has actually been solid but the team’s inability to generate stops has complicated matters.

The 2021-22 Celtics taught us that regular-season clutch numbers are not indicative of what will happen in the postseason. The Celtics were 13-22 in clutch games during that season, then stormed to the NBA Finals. A healthy Tatum on a playoff stage could give the Celtics the focus they’ve lacked at times this season.

But Boston still has a ways to go in nailing down the five-man lineup it wants to trot out in must-have situations, and can also tighten up the execution in those spots.

3. Need more from the core

Derrick White is shooting 36.8 percent overall and 23.6 percent on 3-pointers over Boston’s last five games. He was 7-for-19 shooting vs. Denver, 11-of-26 vs. San Antonio, and 7-of-21 vs. Indiana. White ranks 133rd out of the 136 qualifiers in field goal percentage and 141st out of 164 qualifiers in 3-point percentage during that span.

White’s defense has been excellent, and he’s clearly impacting winning on most nights. But he still hasn’t quite pulled himself out of an early-season shooting funk. And particularly on nights when the Celtics don’t have Brown, it’s even more imperative that he and the rest of his teammates find a bit more consistency.

Payton Pritchard eventually kicked into high gear in the third quarter against the Pacers, but was 7-of-22 combined shooting against Denver and San Antonio. Anfernee Simons has quarters where he’s off-the-charts hot, and the Anferno is fun to watch in those moments, but he sometimes struggles to maintain that output.

On a night-to-night basis, it’s hard to know which of Boston’s young wings the team can lean on, and Mazzulla is forced to pick which dart to throw. He’s been more successful than not, but the wings could help that cause by all stating their cases more often.

The Celtics simply need more consistency from the supporting cast. It felt like Boston was finding that a bit during their December surge, but better opponents — and certainly more physical defenses — have diminished the team’s offensive efficiency.