Raul Gilberto Rosas Rios Jr.[1] (born October 8, 2004) is a Mexican and American mixed martial artist who competes in the Bantamweight division of the Ultimate Fighting Championship (UFC).

He began wrestling in high school and participated in Pankration, an amateur sport similar to mixed martial arts.

[3] Rosas Jr. acquired a record of 5-0 competing exclusively in Tijuana, Mexico for the Ultimate Warrior Challenge promotion winning all five fights by stoppage inside of two rounds.

[4] Rosas Jr. was then booked to compete on Week 9 of Season 6 of Dana White's Contender Series on September 20, 2022, against Mando Gutierrez.

His bout proceeded at catchweight and he was fined 20% of his purse which went to Rosas Jr.[11] He lost the fight via unanimous decision.

As a result, the bout was initially pushed back one week to UFC Fight Night 238 on March 2, 2024.