Also known as

Alexei Fridman

Description

Soviet-born American computer scientist and podcaster, host of the Lex Fridman Podcast. Born in the Tajik Soviet Socialist Republic in 1983, his family moved to the Chicago area shortly after the collapse of the Soviet Union. Trained Brazilian jiu-jitsu at Balance Studios in Philadelphia under the Migliarese brothers, Phil and Ricardo, who guided him from white belt to black belt and awarded him the first stripe on his black belt in April 2023.

Teachers (2)

• 
  Phil Migliarese

  sports_martial_artsBrazilian jiu-jitsu Confirmed

  Confirmed

  Lex Fridman's own Instagram post, quoted by Jiu-Jitsu Times and Jits Magazine, names Phil and Rick Migliarese as the instructors who guided him from white belt to black belt; Wikipedia corroborates that Phil Migliarese awarded a black belt to Lex Fridman

  The evidence establishes the claim: it is sufficient and consistent, and any conflicting evidence is resolved.

  location_onBalance Studios badge

  fact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  2 sources expand_more

  fact_check

  Lex Fridman's own Instagram post, quoted by Jiu-Jitsu Times and Jits Magazine, names Phil and Rick Migliarese as the instructors who guided him from white belt to black belt; Wikipedia corroborates that Phil Migliarese awarded a black belt to Lex Fridman

  visibilityFirst-hand

  “I got a stripe on my jiu jitsu black belt today from Phil and Rick Migliarese who guided me from white belt to black belt, as mentors and friends.”

  — (2023). Lex Fridman Awarded First Stripe on Black Belt by Philadelphia's Migliarese Brotherslink history info

  “Migliarese also awarded a black belt to research scientist and podcaster Lex Fridman.”

  — Wikipedia contributors. (2026). Phil Migliarese. Wikipedia (English)link history info
• person
  Ricardo Migliarese

  sports_martial_artsBrazilian jiu-jitsu Confirmed

  Confirmed

  Lex Fridman's own Instagram post, quoted by Jiu-Jitsu Times and Jits Magazine, names Phil and Rick Migliarese as the instructors who guided him from white belt to black belt; Wikipedia corroborates that Ricardo Migliarese awarded a black belt to Lex Fridman

  The evidence establishes the claim: it is sufficient and consistent, and any conflicting evidence is resolved.

  location_onBalance Studios badge

  fact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  2 sources expand_more

  fact_check

  Lex Fridman's own Instagram post, quoted by Jiu-Jitsu Times and Jits Magazine, names Phil and Rick Migliarese as the instructors who guided him from white belt to black belt; Wikipedia corroborates that Ricardo Migliarese awarded a black belt to Lex Fridman

  visibilityFirst-hand

  “I got a stripe on my jiu jitsu black belt today from Phil and Rick Migliarese who guided me from white belt to black belt, as mentors and friends.”

  — (2023). Lex Fridman Awarded First Stripe on Black Belt by Philadelphia's Migliarese Brotherslink history info

  “Migliarese also awarded a black belt to research scientist and podcaster Lex Fridman.”

  — Wikipedia contributors. (2026). Ricardo Migliarese. Wikipedia (English)link history info

Lineage

• Brazilian jiu-jitsuPhil Migliarese ← Relson Gracie ← Hélio Gracie ← Carlos Gracie · 4 generations

Ranks (3)

• sports_martial_artsBrazilian jiu-jitsu

  receipt_longBlack belt Probable

  Probable

  Lex Fridman announced the promotion himself in a black belt speech video published on his own YouTube channel on 11 November 2018, stating he received his BJJ black belt the previous day from Phil and Ricardo Migliarese at Balance Studios after 9 years of training and competing

  The evidence favours the claim and nothing credible contradicts it, but it falls short of establishing it.

  BJJ Ranking System (2018-11)

  fact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source expand_more

  fact_check

  Lex Fridman announced the promotion himself in a black belt speech video published on his own YouTube channel on 11 November 2018, stating he received his BJJ black belt the previous day from Phil and Ricardo Migliarese at Balance Studios after 9 years of training and competing

  visibilityFirst-hand

  “I got my BJJ black belt yesterday from Phil Migliarese and Ricardo Migliarese at Balance Studios after 9 years of hard training and competing.”

  — Lex Fridman. (2018). Black Belt Speech - Lex Fridmanlink info

  receipt_longBlack belt, degree 1 Confirmed

  Confirmed

  Jiu-Jitsu Times and Jits Magazine both report that Lex Fridman was awarded the first degree on his BJJ black belt by the Migliarese brothers in April 2023, announced via his own Instagram post, roughly four and a half years after his black belt promotion in November 2018

  The evidence establishes the claim: it is sufficient and consistent, and any conflicting evidence is resolved.

  BJJ Ranking System (2023-04)

  fact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  2 sources expand_more

  fact_check

  Jiu-Jitsu Times and Jits Magazine both report that Lex Fridman was awarded the first degree on his BJJ black belt by the Migliarese brothers in April 2023, announced via his own Instagram post, roughly four and a half years after his black belt promotion in November 2018

  “Lex Fridman Awarded First Stripe on Black Belt by Philadelphia's Migliarese Brothers”

  — (2023). Lex Fridman Awarded First Stripe on Black Belt by Philadelphia's Migliarese Brotherslink history info

  “Popular podcaster and veteran grappler Lex Fridman has just been awarded the first degree on his BJJ black belt by both Rick and Phil Migliarese at Balance Studios in Philadelphia, Pennsylvania.”

  — Phil Jones. (2023). Lex Fridman Promoted To First Degree BJJ Black Belt. Jits Magazinelink history info
• sports_martial_artsKōdōkan Jūdō

  military_techDan grade Probable

  Probable

  BJJ Eastern Europe describes Lex Fridman as a Brazilian Jiu-Jitsu and Judo black belt in a report on a judo training session with Travis Stevens; the claim is not corroborated by a primary source and the promotion date and granting instructor are unknown

  The evidence favours the claim and nothing credible contradicts it, but it falls short of establishing it.

  Dan-Kyu System

  fact_checkassessed by FSMverified

  Frederico Muñoz

  Researcher, Martialis

  1 source expand_more

  fact_check

  BJJ Eastern Europe describes Lex Fridman as a Brazilian Jiu-Jitsu and Judo black belt in a report on a judo training session with Travis Stevens; the claim is not corroborated by a primary source and the promotion date and granting instructor are unknown

  “In a detailed video featuring a judo session, Lex Fridman, a Brazilian Jiu-Jitsu and Judo black belt and AI researcher, joins forces with Travis Stevens, a 2016 Olympic silver medalist in judo.”

  — BJJEE. (2024). Judo & BJJ Black Belt Lex Fridman Does Judo with Travis Stevens. BJJ Eastern Europe (BJJEE)link history info

Sources

Identifiers