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Modern WisdomThe Hidden Statistics That Control The NBA - Seth Stephens-Davidowitz
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At a glance
WHAT IT’S REALLY ABOUT
How Hidden Genetics and Data Shape Who Actually Makes the NBA
- Seth Stephens‑Davidowitz explains how height, genetics, and overlooked statistics determine who reaches and succeeds in the NBA, arguing that basketball is unusually governed by biological luck. He details how traits like extreme height, hand size, and vertical leap are vastly more predictive than effort alone, and shows how popular narratives about players’ backgrounds often get the data wrong. Using large datasets and AI tools, he uncovers inefficiencies in NBA scouting, from undervalued standing jumps and hand size to the outsized impact of being an ex‑player’s son. The conversation also explores how AI supercharged his research process, what this means for talent, and how much hard work can or cannot overcome genetic limits.
IDEAS WORTH REMEMBERING
5 ideasExtreme height is both incredibly rare and absurdly rewarded in basketball.
Being seven feet tall is a one‑in‑650,000 trait, yet roughly one in seven seven‑foot men play in the NBA. Meanwhile, an average‑height American man under 5'10" has about a one in 3.8 million chance, showing how disproportionate the payoff for height is.
Each extra inch of height massively boosts NBA odds across the spectrum.
Stephens‑Davidowitz finds that roughly every additional inch of height doubles the probability of making the NBA, from sub‑six‑foot guards up through 7‑footers, highlighting how relentlessly the sport rewards being taller.
Tall NBA players are often worse pure athletes but still win because of structural advantages.
Data shows taller players jump lower, run slower, shoot worse, and choke more under pressure than shorter NBA players. They are selected anyway because basic game geometry (a 10‑foot rim) makes height so valuable for rebounds, blocks, and getting shots off.
Basketball success is unusually genetic, especially compared with many other sports.
The NBA has an outsized number of identical twin pairs and sons of ex‑players, indicating strong genetic influence on height, wingspan, leaping ability, and speed. Sons of NBA players are 744 times more likely to reach the league and significantly better free‑throw shooters due to early technical coaching.
Scouting commonly misses key traits like standing leap and hand size while overvaluing flashier metrics.
Standing vertical (from no run‑up) predicts rebounds and blocks better than running vertical, yet players with big running jumps but mediocre standing jumps are over‑drafted. Similarly, players with very large hands systematically outperform their draft slots, while those with small hands heavily underperform.
WORDS WORTH SAVING
5 quotesBeing seven foot or above is one in 650,000, and about one in seven seven‑footers make the NBA.
— Seth Stephens‑Davidowitz
Basketball seems like the sport designed in a lab to rely on genetics.
— Seth Stephens‑Davidowitz
If you’re under 5'10", you have about a one in 3.8 million chance of reaching the NBA.
— Seth Stephens‑Davidowitz
You shouldn’t be able to reach the top of a sport the way George Muresan did, through a growth hormone disorder.
— Seth Stephens‑Davidowitz
Things that used to take me four months now literally take me four hours.
— Seth Stephens‑Davidowitz, on using ChatGPT’s Data Analysis
High quality AI-generated summary created from speaker-labeled transcript.
