Net rating, rotation depth, and why Chet Holmgren is the hidden key to it all.
The Oklahoma City Thunder's +8.4 net rating leads the league by a margin that should make everyone uncomfortable with how they've been discussing this team. The dominant narrative — SGA is carrying an offence, the defence is solid — misrepresents what's actually happening. OKC's defensive rating of 111.2 doesn't just lead the league. It places them in a tier of defensive performance that, historically, belongs to dynasty-level teams. This is not a young team playing good defence. This is historically elite defence, happening right now, and it is being systematically underreported.
The standard critique of season-long net rating is that it's sensitive to a handful of blowout games. Run up the score three times in a row and you can paper over a mediocre underlying performance. The chart below addresses that critique directly. OKC's rolling 5-game net rating hasn't dipped below +6.0 all season. Their worst 5-game stretch still rates as a very good team. Their best rates as one of the finest in the league's history over any equivalent stretch.
What you're seeing in the timeline isn't random variance around a mean. It's a baseline of dominance with peaks when the defence fully locks in. That baseline is what makes this historically significant. Good teams have hot streaks. Historically great teams maintain a floor that other teams can't reach on their best days.
Net rating is the most honest measure of team quality we have. It adjusts for pace and captures both offensive and defensive performance in a single number. The chart below compares OKC's current season against the best single-season marks in the modern NBA. They sit fifth — behind the two Warriors dynasty teams and the 2023-24 Celtics, and ahead of the 2021-22 Suns team that won 64 games.
The Warriors teams they're being compared to had Kevin Durant, Stephen Curry, Klay Thompson, and Draymond Green. The Celtics had Tatum, Brown, and the league's deepest rotation. OKC is doing this with a 26-year-old in his prime and a collection of players that, on individual talent alone, wouldn't rank in the top five teams in the league. The system, the coaching, and the specific defensive organism they've built is doing work that the roster talent alone shouldn't be able to produce.
If you asked most NBA observers who OKC's best defender is, the majority would say Luguentz Dort. Dort is excellent. His perimeter defence is as good as it gets at the guard position — disruptive, physical, relentless. But Dort is not the reason OKC's defence is historic. Chet Holmgren is.
Holmgren's defensive RAPM of +3.2 leads the team. Not Dort's. Not SGA's. Holmgren's. His presence changes what opponents can attempt at every level of the court. Opponents shoot 8.6 percentage points below the league average at the rim when he's the nearest defender. In the paint more broadly, that suppression is 6.1 points. Even at midrange, where his length makes recovery difficult for shooters who get past the first layer of defence, opponents shoot below average.
The deterrence effect extends beyond shots he actually blocks. At 7-foot with a 7'5 wingspan, Holmgren changes shot selection before defenders even reach the paint. Teams attack the rim at a lower frequency against OKC than against almost any other team in the league. That frequency suppression doesn't show up in any traditional stat. It shows up in the net rating.
Individual talent explains some of what OKC is doing defensively. The system explains the rest. Mark Daigneault's rotations are built around three principles: pressure the ball handler without leaving the rim unprotected, switch enough to avoid mismatches but not so much that you give up corner threes, and fly to the ball in help situations before the drive is completed rather than after.
The result is a defence that doesn't have a clear point of attack. Attacking the pick-and-roll puts you into Holmgren at the rim. Going small to create guard matchups invites SGA's steals and Dort's physicality. Posting up runs into switching schemes that put length on every ball handler. There is no rotation that gives you a free shot. You have to earn everything against this team.
OKC opponents are averaging 111.2 points per 100 possessions — a figure that would have led the league in most recent seasons. They're not just holding teams down. They're making it structurally difficult to score, possession by possession, in a way that compounds over the course of 48 minutes and makes late-game situations significantly easier to manage.
The net rating, the defensive rating, the Holmgren deterrence numbers, the system: they all point at a team that has built something structurally sustainable, not a hot streak. If they maintain this pace, this will be remembered as one of the best defensive seasons of the modern era. It deserves to be talked about in those terms now.