Diogo Reis
“Baby Shark”
Source: onefc.comFrom Manaus to ADCC titles, Diogo “Baby Shark” Reis combines elite competition with building Ágora Jiu-Jitsu in Jundiaí.
Biography
Sources for this profile
ONE Championship, Diogo Reis athlete biography, undated.(opens in a new tab)
Reis won the ADCC world title in the 66-kilogram division in both 2022 and 2024.
Where in the source: Avsnittet om ADCC: «2022 and 2024».
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Diogo Reis competes under the nickname Baby Shark.
Where in the source: Profilens innledning: «Baby Shark».
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Reis is Brazilian.
Where in the source: Avsnittet om ADCC-titlene: «The Brazilian».
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Reis is a jiu-jitsu black belt; he received that rank in 2020, seven months after his brown belt.
Where in the source: Om belteløpet, avsnitt tre: «seven months».
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Reis started jiu-jitsu at ten, introduced by his older brother, and began training with Melqui Galvão after reaching yellow belt.
Where in the source: Andre biografiavsnitt: «yellow belt».
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Reis signed with ONE Championship in 2024.
Where in the source: Siste biografiavsnitt: «signed».
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Kingz, Diogo Reis athlete profile, undated.(opens in a new tab)
Reis was born in Manaus, Amazonas, Brazil, on 20 March 2002.
Where in the source: Biografiens første avsnitt: «March 20, 2002».
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On his Kingz athlete page, Reis advises beginners to concentrate on fundamentals and lists establishing an institute as a future ambition.
Where in the source: Spørsmål/svar nær slutten: «Create an institute» og «focus on the basics».
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Emmanuela Oliveira, VF Comunica, Raio-X de Diogo Reis, 26 February 2025.(opens in a new tab)
Reis began training under Alexandre Oliveira, who taught him until yellow belt, before he moved to Melqui Galvão's team.
Where in the source: Avsnittene om første lærer: «Alexandre Oliveira».
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Reis received his black belt in December 2020 and won the Abu Dhabi World Pro in 2021.
Where in the source: Overgangen til seniorkarriere: «dezembro de 2020».
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At ADCC 2022, Reis won the under-66-kilogram title, defeating Gabriel Sousa in the final.
Where in the source: Avsnittet om ADCC-gjennombruddet: «Gabriel Sousa».
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Ben Coate, ONE Championship, life-story interview with Reis, 28 February 2025.(opens in a new tab)
Reis recalls that his parents worked long hours in Manaus and that his older brother Adriano cared for the siblings. He followed Adriano into football before trying jiu-jitsu.
Where in the source: Første intervjudel, familie og fotball: «Adriano».
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Reis says his early jiu-jitsu lessons taught him punctuality, respect and discipline, changing his manners as a child.
Where in the source: Intervjudelen om første treninger: «arrive on time».
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ONE's life profile reports Brazilian Nationals youth gold after three years of training, another the following year, and North American competition from 2017.
Where in the source: Fortelleravsnittet etter minnene om disiplin: «three years».
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Reis recalls that living and training in the United States, where he saw Rubens Cobrinha Charles at close quarters, made earning a living from jiu-jitsu seem achievable.
Where in the source: Hans tilbakeblikk på USA-oppholdet: «Cobrinha».
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As a teenager, Reis funded competition travel by selling raffle tickets and asking friends for help. He recalls expensive flights from Manaus to São Paulo, entry fees and the need for a US visa.
Where in the source: Intervjudelen om reisekostnader: «raffle tickets».
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In 2025, Reis said he wanted to encourage children to pursue jiu-jitsu and saw helping the next generation as more lasting than medals.
Where in the source: Siste intervjudel: «example for the kids».
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IBJJF, European IBJJF Jiu-Jitsu Championship 2019, official results.(opens in a new tab)
Reis won male juvenile 2 blue-belt featherweight at the European IBJJF Jiu-Jitsu Championship 2019, representing Alliance.
Where in the source: Utøverresultater, herre/juvenile 2/blått/fjærvekt (64.00kg); navnanker «Diogo Pinheiro dos Reis», plass 1.
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IBJJF, Pan IBJJF Jiu-Jitsu Championship 2019, official results.(opens in a new tab)
Reis won male juvenile 2 blue-belt featherweight at the Pan IBJJF Jiu-Jitsu Championship 2019, representing Alliance.
Where in the source: Utøverresultater, herre/juvenile 2/blått/fjærvekt (141.60lb); navnanker «Diogo Pinheiro dos Reis», plass 1.
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IBJJF, Campeonato Brasileiro de Jiu-Jitsu 2019, official results.(opens in a new tab)
Reis won male juvenile 2 blue-belt featherweight at the Campeonato Brasileiro de Jiu-Jitsu 2019, representing Alliance.
Where in the source: Utøverresultater, herre/juvenile 2/blått/fjærvekt (64.00kg); navnanker «Diogo Pinheiro dos Reis», plass 1.
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IBJJF, World IBJJF Jiu-Jitsu Championship 2019, official results.(opens in a new tab)
Reis won male juvenile 2 blue-belt featherweight at the World IBJJF Jiu-Jitsu Championship 2019, representing Alliance.
Where in the source: Utøverresultater, herre/juvenile 2/blått/fjærvekt (141.60lb); navnanker «Diogo Pinheiro dos Reis», plass 1.
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IBJJF, report on Reis and Munis at Curitiba Summer Open, March 2023.(opens in a new tab)
In 2022, his first year competing at black belt in IBJJF events, Reis won the Brazilian Nationals and took bronze at the World Championships.
Where in the source: Første Reis-avsnitt: «placed third».
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At the 2023 Curitiba Summer Open, Reis won featherweight in gi and no-gi, recording five wins and three submissions. In the gi final, he converted a sweep and guard pass into an armbar as his opponent escaped side control. In the no-gi final, he swept, passed twice and eventually took the back for a rear-naked choke.
Where in the source: Hele Reis-delen før Munis; siste avslutning: «rear naked choke».
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IBJJF, 2023 Pan Jiu-Jitsu Championship Recap, 2023.(opens in a new tab)
Reis won the male black-belt light-featherweight division at the 2023 Pan Championship.
Where in the source: Vinnerlisten, under herreoverskriften: «Light Feather - Diogo Reis».
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Emmanuela Oliveira, VF Comunica, Time de Melqui Galvão é destaque no ADCC, 28 August 2024.(opens in a new tab)
Reis defended the ADCC under-66-kilogram title in Las Vegas in 2024. He submitted Huaiqing Xu, defeated Fabricio Andrey by decision and Josh Cisneros on points, then submitted Diego Pato with an arm-triangle in the final.
Where in the source: Siste hovedavsnitt om Reis: «katagatame».
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IBJJF, Diogo Reis athlete results, adult light-featherweight 2025 results.(opens in a new tab)
In the adult black-belt light-featherweight division in 2025, Reis won the European Championship and finished second at the Pan and World Championships.
Where in the source: Åpne Adult-panelet; vekt «Light Feather» og de tre arrangementene fra 2025.
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Kriel Ibarrola, ONE Championship, 2025 submission-grappler award report, 31 December 2025.(opens in a new tab)
In his March 2025 ONE debut at Fight Night 29, Reis submitted Shoya Ishiguro at 6:05, combining a head-scissor choke with a kimura attack.
Where in the source: Første kampreferat: «6:05».
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In December 2025 at ONE Fight Night 38, Reis defeated Daiki Yonekura by unanimous decision to win the vacant ONE flyweight submission-grappling world title. Over ten minutes, he applied top pressure and threatened chokes while defending Yonekura's leg-lock attacks.
Where in the source: Andre kampreferat: «unanimous decision».
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ONE named Reis its 2025 Submission Grappler of the Year.
Where in the source: Overskriften og innledende prisbegrunnelse: «2025».
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John Wolcott, ONE Championship, Fight Night 43 results, 16 May 2026.(opens in a new tab)
At ONE Fight Night 43 in May 2026, Reis moved up to bantamweight and defeated Yuki Takahashi by unanimous decision, repeatedly recovering back control and attacking submissions.
Where in the source: Første kampseksjon, bantamvekt: «Yuki Takahashi».
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Kriel Ibarrola, ONE Championship, Andrey interview about Reis, 6 June 2026.(opens in a new tab)
Fabricio Andrey says he and Reis developed together through the colored belts in Manaus. Andrey, two years older, used to take Reis home after training and still regards him as a younger brother.
Where in the source: Første tilbakeblikk og sitat: «take him back».
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Andrey contrasts his own instinctive attacking approach with Reis's deliberate planning and ability to identify weaknesses. He says training with Reis teaches him competition strategy and how to use the rules.
Where in the source: De to sitatene om treningssamarbeid: «rules and the strategy».
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By June 2026, Reis had formed Agora Jiu-Jitsu, while Andrey had joined Alliance.
Where in the source: Avsnittet om ulike lag: «forming Agora».
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Ágora Jiu-Jitsu, Sobre, undated academy biography and teaching description.(opens in a new tab)
Reis is the founder and head coach of Ágora Jiu-Jitsu in Jundiaí, São Paulo.
Where in the source: Rolleoverskrift «Head Coach e Fundador», sted i opprinnelsesavsnittet.
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Ágora describes its purpose as providing high-level training in Brazil while also welcoming beginners. Its beginner instruction starts with falling safely, positioning and defense before more advanced work.
Where in the source: Opprinnelse og undervisningsdelen: «Fundamentos primeiro».
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Ágora Jiu-Jitsu, Jundiaí academy homepage, undated.(opens in a new tab)
The academy offers adult fundamentals and competition classes in gi and no-gi, alongside children's groups divided by age and level, including a competition group.
Where in the source: Timeplanens innledning og FAQ om barn: «Competição Kids».
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