UFC Fight Night: Mateusz Gamrot vs. Quillan Salkilld (Lightweight, Main Card)

Platform comparison

Market context

Mateusz Gamrot faces Quillan Salkilld in a lightweight UFC Fight Night bout scheduled for 8 August, with the market set to resolve on the official UFC result rather than media scores or live odds. That matters for programmatic trading: the cleanest automation is to treat the event as a binary winner-or-void contract, with a hard fallback to 50-50 if the bout is ruled a draw, no contest, cancelled, not scored, or pushed beyond 22 August. [8]

The 42% crowd-implied YES price sits below the more established name on paper, but not by a margin that suggests a routine mismatch. Gamrot is the more experienced UFC-level grappler at 26-4, with strong takedown volume and defensive numbers on ESPN’s fight centre, while Salkilld enters at 12-1 with higher striking pace and a 57%+ accuracy profile across compiled stat pages. In comparable match-ups, the market has usually rewarded wrestle-heavy favourites when they can sustain takedown pressure, but it has also priced in upset risk when the younger fighter has the cleaner stand-up and finishing upside. [1][2][9]

For traders running bots, copy-trades, or conditional orders, the main catalysts are the final weigh-in, any late card reshuffles, and confirmation that both fighters make the cage. UFCStats already lists the bout on the 8 August event card, so the practical check is whether the official bout page stays live and whether the UFC publishes an unequivocal winner after the fight; any cancellation, no-contest ruling, or short-notice replacement can flip the contract into the void path. Recent market listings have also shown Salkilld around -140 and Gamrot around +120, which is consistent with the current sub-50% YES side but still leaves room for sharp repricing if the fight week news flow changes. [8][9][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.