PMP · MMAUFC Vegas 121
Main Event · Bantamweight
Raul Rosas Jr.12-1
VSRaoni Barcelos22-5 · #13
Market opens soon
UFC · MMA
UFC Fight Night: Rosas Jr. vs. Barcelos
Saturday, September 26, 2026 · main card 6:00 PM EDT · UFC Apex · Paramount+
The 7 OraclesPMP · MMAUFC Vegas 121Saturday, September 26, 2026Quick Answer
As of August 27, 2026, UFC Fight Night: Rosas Jr. vs. Barcelos is headlined by Raul Rosas Jr. (12-1) vs Raoni Barcelos (22-5, #13) in the bantamweight division, Saturday, September 26, 2026 at UFC Apex. Kalshi and Polymarket list combat-fight markets close to fight night — when UFC Vegas 121's contracts open, the tale of the tape below fills with live win probabilities for all 1 bouts.
Why you can trade this card
Two five-fight win streaks collide in Rosas Jr.’s first UFC main event — the 21-year-old phenom against #13-ranked Barcelos, who just ran through Garbrandt, Talbott and Simon. Apex cards price on Kalshi and Polymarket like any other UFC night; card is still filling in below the headliner.
What the market says
The full card at a glance — the market favorite, cross-platform price gap, method lean and liquidity for every bout. Market-derived, not a pick.
No bout on this card has a listed prediction market yet. Kalshi and Polymarket open combat-fight contracts close to fight night — the scanner fills with live market favorites, win probabilities and price gaps the moment they do. No prices are shown before then.
- Raul Rosas Jr. vs Raoni BarcelosMain Event · Bantamweight
Main card
PMP · MMAUFC Vegas 121
Main Event · Bantamweight
Raul Rosas Jr.12-1
VSRaoni Barcelos22-5 · #13
Market opens soon
The prediction-market read
UFC Fight Night: Rosas Jr. vs. Barcelos brings 1 bouts to UFC Apex in Las Vegas, Nevada on Saturday, September 26, 2026, live on Paramount+. The card is headlined by Raul Rosas Jr. (12-1) against Raoni Barcelos (22-5, #13) in the bantamweight division.
Kalshi and Polymarket list combat-fight markets close to fight night, so UFC Vegas 121's win prices aren't posted yet. The card above shows the full tale of the tape — records, divisional ranks and country — and each bout flips to a live market-implied win probability the moment its contract opens. No prices are fabricated before then.
Prediction markets are not sportsbooks — you trade a contract that settles at $1 or $0, not a wager against a house line. Informational only; trade responsibly.
UFC Vegas 121 — frequently asked
Who is favored at UFC Vegas 121?
Raul Rosas Jr. (12-1) meets Raoni Barcelos (22-5) in the main event. UFC Vegas 121's combat-fight markets list close to fight night — once they open, the tale of the tape above shows the market favorite and a live win probability for each bout, with no fabricated prices before then.
How can I watch UFC Vegas 121?
UFC Fight Night: Rosas Jr. vs. Barcelos streams on Paramount+. Main card starts 6:00 PM EDT on Saturday, September 26, 2026. While you watch, the live market read for every bout — market-implied win probability and comma-free American odds — is on this page the moment UFC Vegas 121's contracts list.
Can you trade UFC Vegas 121 fights on Kalshi or Polymarket?
Yes — these are prediction markets, not a sportsbook. UFC cards carry live markets on both venues: Kalshi is a CFTC-regulated exchange available to traders in all 50 states, and Polymarket is open to US traders too. We lead with Kalshi for the broader US-listed slate and the deeper per-market book. You take a yes/no position on a fighter in a contract that settles at $1 or $0 — no point spread, just the binary outcome.
When and where is UFC Vegas 121?
UFC Fight Night: Rosas Jr. vs. Barcelos takes place Saturday, September 26, 2026 at UFC Apex in Las Vegas, Nevada, broadcast on Paramount+. Main card starts 6:00 PM EDT.
How do prediction-market MMA odds work?
Each fighter's price is the market-implied probability they win, quoted in cents (a 69¢ contract implies a 69% chance) and shown here as comma-free American odds. Unlike a sportsbook line, the contract settles at $1 if the fighter wins and $0 if they lose, so the price IS the probability.
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Prediction markets carry risk. Contracts can settle at $0. Informational only — not financial advice. Trade responsibly.