His opponent, 31-year-old veteran Aori Qileng, returns after a six-month break following a no-contest due to an accidental groin kick in his last fight against Daniel Marcos at UFC Fight Night 236.

Marcos has yet to lose as a professional. In the UFC, he holds wins over Saimon Oliveira, Davey Grant and John Castaneda.

Meanwhile, Rosas Jr. is coming off a unanimous decision win over Aori Qileng at UFC 306 this past September that extended his winning streak to three.

Rosas Jr. (9-1 MMA, 3-1 UFC) makes his fifth octagon appearance when he takes on Aori Qileng (25-11 MMA, 3-3 UFC) in Saturday's UFC 306 (pay-per-view, ESPNews, ESPN+) opener at Sphere in Las Vegas.

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