Roberto Jimenez is an American-born Ecuadorian grappler and Brazilian jiu-jitsu (BJJ) black belt competitor.

[1] He started Brazilian jiu-jitsu at the age of 4 encouraged by his father Muay Thai and BJJ practitioner Raul "Gacho" Jimenez.

During his first years, the family lived in South America, then when he was 10 moved to Texas where Jimenez joined an Alliance Jiu Jitsu academy.

[5][8] At purple belt trained by his father and Lucas Lepri, he became 2018 IBJJF World champion in the adult division after submitting all his opponents, winning double gold in his weight and in openweigh after defeating MMA fighter Mason Fowler in the final.

[2] He finished second in February at the ADCC North American West Coast Pro Trials after losing to black belt and MMA fighter DJ Jackson.

[9] In August 2018, he was promoted to brown belt level by his father and Romero Jacare Cavalcanti during an Alliance Seminar.

[11] In July 2020 he entered Third Coast Grappling (3CG) an invitational tournament, at 3CG Kumite III Jimenez defeated Tye Ruotolo in first round on points.

[14] In October 2020 Jimenez lost to Craig Jones at WNO 4[15] then defeated Dante Leon at the December 2020 edition of the tournament via 1 Round Decision.

[17] Jimenez submitted four opponents in June 2021 to win Eddie Bravo’s Combat Jiu-Jitsu Worlds welterweight title.

[38] Jimenez was due to compete in the 2024 ADCC World Championship but he withdrew from the event in order to enter the under 80kg division of the Craig Jones Invitational on August 16-17, 2024.