By Trading Jaylen Brown, Brad Stevens Is Making A Basketball Bet By Fully Diving Into The Idea Of "Possessionmaxxing"

Winslow Townson. Getty Images.

With Brad Stevens and Bill Chisholm slated to address the media later today, it'll be their first chance to provide some clarity around one of the biggest and most significant trades in franchise history. For fans, I'm sure there are plenty out there who would start that presser with the following question

When trades of this magnitude happen and appear to be so lopsided given the pieces and players involved, it's hard to prevent yourself from letting your emotions run wild. On the surface, this is one of those trades that can make you scratch your head. The Celtics didn't really save any money, they got back an older and more injury prone player, they willingly decided to break up their championship core which consisted of two homegrown talents, they were just coming off a surprise season where the traded player had an All NBA/MVP vote getter caliber season etc etc.

In most cases, a trade like that brings a lot of anger and even more confusion. You're sitting there thinking

"What the fuck was Brad Stevens thinking?"

Since the trade was announced, this was something I've probably played over in my mind 10,000 times. I just could not accept that a GM and a front office that is so smart and so good at this thing would suddenly just decide to go YOLO and somehow turn into like Joe Dumars or something when it came to building a basketball team. It went against everything we know and love about Brad Stevens, which is what made the entire thing so confusing.

Now you don't have to like the trade (I obviously am not thrilled), you don't have to think it will work (I am skeptical come the Spring), but if you're wondering why this happened, it's starting to become pretty clear when you take a step back and understand how the team is now approaching team building.

That suprising 56 win season with Jaylen Brown leading the way? At the time, you could make the case that it was validation. Validation that he could carry a team, validation that the young guys were good, validation that this team could win with lesser talent.

Little did we know, that season would provide validation for the Celtics, but not in the way we thought. While fans may have thought it proved Jaylen right, what that success actually did was seal his fate.

It was the proof of concept that would not only give us a window into how Brad Stevens & Co are building this roster, but also what ultimately ended Jaylen Brown's Celtics career.

In the midst of the aftermath of the trade, while lying awake at night staring at my ceiling, my deranged brain kept thinking about one random clip from the Celtics 2024 championship doc. This one right here

Why does this matter? Because it is my belief that we are seeing this same exact approach be taken in 2024, just like it was over two decades ago when it came to building the next Celtics championship roster.

Back then, it was the Big 3 model. You needed to build a Big 3 if you had any hope of winning a title. That's just how things were at that time in the NBA. 

Now? With the new CBA and roster building restrictions, those days are over. Nobody is willingly signing up to be the 2024 Suns. With the new parameters of how championship teams are being built, there has been a shift from this Big 3 idea to something more sustainable under the current league climate

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Call it, Possessionmaxxing.

What the fuck is Possessionmaxxing? Just like the name suggests. Maximizing your possessions. If we look at the 3 most recent Champions who have won titles in this new CBA world, they ALL share that in common. Low TOs, offensive rebounds, defense, and good efficiency.

Teams that take care of the ball, are efficient offensively, force turnovers on defense, and hit the offensive glass are the ones winning the titles in this current era. That is just a straight up undeniable fact. The 2024 Celtics, the 2025 Thunder, and the 2026 Knicks all followed that blueprint. 

Given the restrictions around how teams are built, what the NBA is telling us is that now, not wasting possessions and winning the possession battle is the way forward.

How do you do that?

1. You take care of the ball (turnover suppression)

2. You are efficient offensively

3. You force turnovers

4. You hit the offensive glass. 

So how does this relate back to the Jaylen Brown trade and the Celtics approach?

Interestingly enough, this shift into Possessionmaxxing is not a sudden change for Brad Stevens and the Celtics. In fact, it's something they've been tweaking and improving since Year 1 of the Mazzulla Ball Era.

Look at what those two charts are telling you. Since 2022-23, look at the TOV%. From 13th in the Ime season, to 7th, to 2nd these last 3 years. During those same years, look at the OREB%. 

You can see how this is directly tied to their halfcourt production. The jump from 10th under Ime in pts/poss, to never outside the top 5 under Joe. Why? Look at how much better the OREB and putbacks have gotten. That's why despite a high-variance offensive approach, the Celtics have still been able to maintain elite half court production. 

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Go back to the 2025-26 season and what we saw. During the year, the Celtics were pretty average when it came to their collective TS% and eFG%. They were 11th in eFG% and 13th in TS%. It wasn't exactly this dominant shooting season like we saw during the title year. So how were they able to have the 2nd best offensive rating in the NBA (120.0) trailing only the Nuggets (121.2)?

Possessionmaxxing.

Think of it like this. If Mazzulla Ball is the system, then Possessionmaxxing is a system enhancer. It's how you take Mazzulla Ball to an even higher level (in theory). 

Yes, the individual play of Jaylen Brown was an important piece to last year's success. But it's rather clear now that what we were actually seeing was confirmation of the approach. Limit TOs, be nails defensively, dominate the offensive glass.

So if the Celtics were able to do that stuff with Jaylen Brown on the team, why did they need to trade him?

This is where you have to remember all the factors. It's very clear that Brad Stevens and the front office do not feel that at his current price, Jaylen Brown's on the court value or impact is the best allocation of those dollars and usage under this Possessionmaxxing approach. It's a situation that is part financial and part analytical.

If Jaylen was making $30M? I would imagine we would not be here today. At that dollar/impact cost, you can live with some of the ways Jaylen's flaws hurt you (high TOs, low AST, poor off ball defense, etc) within this approach. Now I do think it's extremely bullshit how some are using analytics to suggest that Jaylen Brown is like the 500th best player in the league and all that stuff. That's bullshit and is only doing analytics more harm than good.

But again, in an approach that is built around not wasting possessions through various factors while ALSO maximizing the fit around the best player, you can start to acknowledge the thought process.

That's the other thing that 2025-26 confirmed for us and I'm sure Brad Stevens as well. While he basically called the success of the season fake at his end of season presser, what his actions this summer have shown us is that he does not think the "process" of that season was fake. It showed him that you can utilize this Possessionmaxxing approach around a singular star and be successful. When that singular star goes from Jaylen Brown to Jayson Tatum, that's obviously significant. 

A lot is made about the on/off differential and all that stuff and how it supposedly makes Jaylen Brown a "negative" player. But what's important is to look at what happens in those minutes, because it helps explain this summer's approach even further

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One of the main factors in Jaylen's on/off differential is the drastic drop in DRTG, while maintaining a similar ORTG (121). When you watch Celtics games and see Joe's rotations from last year, this makes some sense. When Jaylen would come out, the defensive monsters would check in. The Walsh/Hugo/RHJ/Baylor/Minott's of the world would come into the game and immediately start causing chaos. In those minutes, what did we see?

The Celtics' turnovers went down, the opponents' TOs went up. Their OREBs went down. Despite a lower TS% with Jaylen off the court, the Cs offense was able to survive because they were solid defensively, forced more TOs, took better care of the ball etc.

This does NOT mean the Celtics were "better without Jaylen" as these numbers are now being spun to show. What it does show is the confirmation of the Possessionmaxxing approach. That if you can take care of the ball, rebound, be efficient, and force TOs, you can thrive. Surrounding low TOV% players (White/Pritchard) with defensive and OREB monsters (Walsh/Hugo/Garza etc) and some good spacing (Hauser/Baylor) was a formula for success.

When you look at it that way, that is what Brad has now done.

Now let's look at ALL of the Celtics moves this season in addition to the Jaylen trade, and you can see how everything ties together

1. Mitchell Robinson is the best offensive rebounder on the planet. He is also very active defensively (2.1 deflections) and helps generate TOs

2. Mike Conley may be old as fuck, but he never turns the ball over. Ever. When it comes to turnover suppression, he's elite

3. Paul George also doesn't turn the ball over much, and is an elite off ball shooter who can hold his own defensively when healthy (at times)

This trade also puts things more in the hands of Payton Pritchard, who is an extremely efficient player who also virtually never turns the ball over aka wastes possessions. 

When you think back to Brad's presser where he talked about rim pressure, dunks, and creating better initial looks, those are all things he addressed this summer. Rim pressure doesn't just mean drives and dunks. You can get there through P&R, you can get there through transition/causing turnovers, you can get there by off ball cutting etc. All of those things are areas the Celtics have improved.

This is the bet being made by Brad Stevens. That fully diving into the Possessionmaxxing approach in combination with Mazzulla Ball puts the Celtics in the best position to win in this new CBA world. It may work, it may not. That's why they play the games. There's obviously health risks that could destroy the whole plan, but that's just part of it. You then add in all the other financial components to this deal and what it means moving forward, and if you're looking for the "why" when it comes to this decision, I think this pretty much sums it up.

Enhance your roster to maximize the possession game + healthy Tatum + surround Tatum with pieces that fit and maximize his game

This is not to say Jaylen Brown did not do those things. It's more to say that we live in a new world, where that type of roster (2024) most likely cannot exist. So, just like Wyc talked about in the early 2000s, it was time to find an approach that is consistent with the champions in this new era. When it comes to the idea of Possessionmaxxing, it's fair to say that Jaylen Brown is perhaps not the best fit for that specific approach. If the goal is to limit turnovers/rebound/be efficient, those are 3 holes in Jaylen's game. At his price, those negatives outweigh the positives, even if that hurts to hear. 

How will the Celtics handle the playoffs, where the margins shrink and everyone tries? That's the million-dollar question. As we just saw, this approach alone wasn't quite good enough in the playoffs. At the end of the day, your talent still needs to execute, especially when the margins get smaller. Yes, the Knicks dominated the possession game, but they also shot the shit out of the ball and when it came time for their players to step up, they stepped up. In the Sixers series, that did NOT happen from Jaylen Brown to Derrick White to Payton Pritchard etc. There are still plenty of concerns about the playoff offense, the shot creation etc. All things we just saw the Celtics struggle with, even with Jayson Tatum in the lineup.

We know given the approach and the current roster, that the Celtics have enough to be winning in the 50s and securing a top seed. That's fine. But we also know that this regular season success doesn't mean dick if you can't also win once things truly matter in the Spring. 

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It'll be fascinating to see how it all shakes out, but if you find yourself sitting there wondering what basketball sense this trade could have made for Brad, this is it. 

Welcome to the era of Possessionmaxxing. 

You don't have to like it, you don't have to think this is the way forward, but it's the path this team (and the last 3 Champs) have chosen.