UFC Vegas 121 Weigh-Ins Set Main Event

UFC Vegas 121 moved through its weigh-in session with the 24 fighters reported to have made weight, clearing the way for a bantamweight main event between Raul Rosas Jr. and Raoni Barcelos. Rosas, who is headlining an event for the first time, weighed 136 pounds. Barcelos came in at 135 pounds on the nose, according to the reported results. The matchup now arrives with both headliners having completed the final pre-fight requirement described in the weigh-in coverage.

The main event provides a straightforward contrast in the supplied pre-fight context. Rosas enters after what was described as the biggest victory of his career to date, against Rob Font, and is seeking a sixth consecutive win. Barcelos brings a five-fight winning streak into the contest. The reports also describe Barcelos as 39 years old, framing the bout around two fighters who have recently built momentum rather than a main event disrupted by a scale issue. Rosas used the one-pound allowance available for a non-title fight, while Barcelos weighed one pound below that 136-pound ceiling. Those measurements do not decide the fight, but they confirm that the scheduled headliners reached their required marks before the event.

Rosas and Barcelos clear the scale

Rosas’ 136-pound reading is especially notable because it came ahead of his first UFC event headliner. The available report identifies the bout as a bantamweight clash and notes that Rosas used the non-title allowance. Barcelos, meanwhile, registered 135 pounds. Both figures fit within the reported parameters for the matchup, leaving no reported weight issue attached to the main event. The recent form supplied for each athlete adds context without predicting an outcome. Rosas is pursuing his sixth straight victory following the win over Font. Barcelos is riding a five-fight winning streak of his own. That makes the weigh-in result more than a simple administrative update: it preserves a meeting between fighters entering on stated runs of success. The scale results establish that neither competitor’s momentum was interrupted at this stage of fight week.

Elsewhere on the card, the most discussed margin on the scale involved Luis Hernandez and Sedriques Dumas. Hernandez weighed 204 pounds for their short-notice light heavyweight clash, while Dumas weighed 197 pounds. The report says both made weight, so the seven-pound separation is a confirmed weigh-in detail rather than a missed-weight situation. It is also not a basis for declaring an advantage in the fight itself; the supplied material only establishes the difference at the weigh-in. John Castaneda’s route to the bantamweight limit required a second attempt. The reports state that Castaneda initially did not reach the 136-pound limit for his bout with Alateng Heili, but later returned and weighed 136 pounds. Bloody Elbow reported that he shaved his head before the successful second attempt. The practical result is clear: after the initial concern, Castaneda made the target and the bout remained positioned to proceed under the reported weigh-in outcome.

Castaneda resolves an early weight concern

Castaneda’s second trip to the scale was the lone exception to an otherwise smooth session described by BJPenn. His first attempt created uncertainty because he was reported to be over by 0.5 pounds. More than 20 minutes later, he returned with a shaved head and registered 136 pounds, the stated bantamweight limit. The sequence matters because it distinguishes an initial failure from the final result: Castaneda ultimately made weight. That clarification is important when reading the broader 24-fighter result. The reported total does not mean every athlete hit the mark without adjustment on a first attempt. Instead, Castaneda’s case shows how the final weigh-in outcome included a successful correction within the session. For Alateng Heili, it means the scheduled bantamweight opponent was able to reach the required number after the additional attempt. The event’s weigh-in story therefore has three separate threads. The headliners made their marks and retained a matchup between two fighters on supplied winning streaks. Hernandez and Dumas both made weight despite a notable seven-pound difference on the scale. Castaneda overcame the only reported early complication and reached 136 pounds on his return. Together, those details give the reported 24-for-24 outcome its context without extending the numbers into predictions about fight-night performance.

• Raul Rosas Jr. weighed 136 pounds for the bantamweight main event, using the reported one-pound non-title allowance.
• Raoni Barcelos weighed 135 pounds, while John Castaneda reached 136 pounds on his second attempt after initially being over the limit.
• Luis Hernandez weighed 204 pounds and Sedriques Dumas weighed 197 pounds; both were reported to have made weight for their short-notice light heavyweight fight.

UFC Vegas 121’s reported weigh-in results leave the main event intact, with Rosas and Barcelos both on weight for their bantamweight meeting. The session also produced a resolved scare for Castaneda and a clearly documented scale gap between Hernandez and Dumas. With all 24 fighters reported to have made weight, the final focus can shift from the scales to the scheduled fights.