Data / entry 02 / October 2025 / 5 min read

Can Jaylen Brown actually carry the Celtics without Tatum

Boston gutted its own championship roster this summer. Here's what the numbers say about Jaylen Brown's odds, not what the storyline says.

Marcus wasn't wrong to say it. In about ten days, Boston traded away Jrue Holiday, traded away Kristaps Porzingis, and let Luke Kornet walk. Three rotation pieces off a team that won the title fifteen months earlier, all shipped out to duck the luxury tax while Jayson Tatum recovers from a torn Achilles that has him out for most, maybe all, of this season.

Start with what Boston actually gave away

• Out: Jrue Holiday, traded to Portland
• Out: Kristaps Porzingis, traded to Atlanta
• Out: Luke Kornet, signed with San Antonio
• In: Anfernee Simons, Georges Niang, and rookie / two-way depth

The Celtics shed something like $300 million in future money to get under the second apron, and it shows. This roster isn't hiding a secret contender underneath, it's the result of a full salary dump. Vegas noticed before the season tipped: Boston opened as low as +6000 at some books and sits at +1800 even at its best number, ninth-best odds in the league.

Here's the part that stings a little more:

The oddsmakers set Boston's preseason win total at 41.5. For a team that's strung together ten straight seasons of .500 basketball or better, a number barely a coin flip above .500 is the market telling you plainly: this is a step back, not a bridge.

The part everyone skips: Brown's own trend line

The story going in is "Jaylen Brown steps up as the number one option." But his scoring has gone down every single season for three years: 26.6, then 23.0, then 22.2. His shot attempts dropped to a five-year low last season, 17.7 a game, while his assists climbed to a career high. That's the profile of a guy getting more efficient in a complementary role next to a ball-dominant star, not one building toward a 30-shot-a-night workload.

It gets a little more complicated:

Efficiency dipped too. Field goal percentage down to 46.3, his worst mark since his rookie season. Three-point shooting down to 32.4. None of that screams "ready to be a number one option," it screams "coming off a down year, physically."

Where I have to be fair to him

Regular season numbers are one thing. What Brown does when the games matter is a different data set, and it's the best card he's got. He's a career 20.0 points per game guy in the regular season. In the Finals specifically, across two trips, he's at 22.3. He won Finals MVP in 2024 averaging 20.8 points, 5.4 rebounds, and 5.0 assists against a Mavericks defense built to stop exactly his skill set.

One All-Star, even one who elevates on the biggest stage, has never been enough on its own to win sixteen playoff games. Every team that's cut down the nets in the last twenty years had at least two players performing at an All-Star level deep into May. Boston has one, and a supporting cast assembled to save money, not to win in June.

The verdict

No, I don't think Jaylen Brown carries this specific roster to a championship, and the data isn't close enough to talk myself into pretending otherwise. What I do think it supports is a narrower bet: Brown finishes the season having proven he can be a legitimate number one option, Boston stays competitive enough to protect that ten-year .500 streak, and this becomes the résumé he needed for when Tatum comes back healthy. That's a real outcome. A parade is not.