Mederos vs Jones Prediction Market Odds, August 22, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
Mederos | — | O 0.5 — | 100%100% | 100% Kalshi |
Jones | — | U 0.5 — | 0%0% | — |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
Marquel Mederos | — | O 0.5 — | 100%100% | 100% Kalshi |
Mason Jones | — | U 0.5 — | 0%0% | — |
Mason Jones is the 77c favorite on Polymarket and 76c on Kalshi in the Mederos vs Jones lightweight bout on the UFC Fight Night: Hernandez vs. Rodrigues main card in Sacramento, with MarQuel Mederos at 24c and 26c on the other side. The books agree to within 2c, so there is no meaningful cross-platform disagreement on this fight. The board carries roughly $77K in lifetime volume, and the same Polymarket book prices Over 2.5 rounds at 65c, which is the market saying it expects Jones to win a decision rather than finish one.
Mason Jones is the 77c favorite on Polymarket and 76c on Kalshi against MarQuel Mederos, and the round-total ladder on the same board prices Over 2.5 rounds at 65c. Those two numbers are the whole read on Mederos vs Jones: the market is confident about who wins and just as confident it goes to the judges. Jones brings a 74-inch reach against 69.5 inches, seven straight wins, and an 18-2 record per ESPN. Mederos is 11-1-1 and has never lost inside the Octagon, but every one of his four UFC appearances has gone the full three rounds. Lifetime board volume across Kalshi and Polymarket sits near $77K as of August 22, 2026.
Mederos vs Jones Market Context
Jones, 31, fights out of Wales and has not lost since a unanimous-decision defeat to Ludovit Klein in July 2022. ESPN lists seven wins since, including a unanimous decision over Axel Sola on March 21, 2026, a second-round TKO of Bolaji Oki at 3:18 on September 6, 2025, and a unanimous decision over Jeremy Stephens on May 3, 2025. His career finishing profile is the strongest single argument for the 76c to 77c price: 8 of his 18 wins are by KO or TKO and 3 more are by submission, and ESPN credits him with zero losses by either method. He is 5 feet 10 with a 74-inch reach and fights orthodox.
Mederos, 29, is the harder fighter to price because his UFC sample is short and uniformly close. He is 3-0-1 in the promotion: a unanimous decision over Landon Quiñones on February 3, 2024, a split decision over Austin Hubbard on March 29, 2025, a unanimous decision over Mark Choinski on June 7, 2025, and a three-round draw with Chris Padilla at UFC 327 on April 11, 2026. His only career loss is a split decision to Santiago Guzman at Fury FC 57 in February 2022. He owns 6 KO or TKO wins in 11 victories, but none of them came in the UFC, and at 5 feet 10 with a 69.5-inch reach he gives up 4.5 inches of reach to an orthodox opponent who fights long. Padilla, the man who fought him to a draw four months ago, is on this same card against Nasrat Haqparast.
The cross-platform picture is unusually tight. Kalshi has Jones at 76c and Mederos at 26c; Polymarket has Jones at 77c and Mederos at 24c. A 1c to 2c gap is inside the normal spread on a three-round undercard fight, so neither book is offering a materially better number on either side. Kalshi carries about $27.1K of lifetime volume on the Jones contract and $13.4K on the Mederos contract, while the Polymarket pair has traded roughly $34.1K. The board's snapshot series runs from 8:11 PM ET on August 21 to 7:21 AM ET on August 22, 135 Polymarket captures and 62 on Kalshi, and across that window Jones ticked from 76c to 77c on Polymarket and 75c to 76c on Kalshi. That is a one-cent drift in the favorite's direction inside a two-cent overnight range, and it is the only movement the board has recorded so far.
Mederos vs Jones Round Totals and Method Props
The method and round markets are Polymarket-only on this fight, and they are thin, so treat them as directional rather than as deep books. Over 2.5 rounds prints 65c on about $447 of lifetime volume and Over 1.5 rounds prints 74c on almost none. The distance prop, which asks whether the fight goes the full three rounds, sits at 59c. Backing that out, the market prices a combined 41c chance of any finish: 26c for a KO or TKO and 15c for a submission, with the submission book the deepest of the props at roughly $1.8K lifetime.
Split by fighter, Jones by KO or TKO trades at 19c and Mederos by KO or TKO at 9c. That is the interesting tension on the board. Jones has 11 finishes in 18 wins over his whole career, yet the market gives him a 19c chance of finishing here and a 77c chance of winning, which implies most of his win equity is on the scorecards. The record supports that framing: two of his last three listed wins were unanimous decisions, and Mederos has never been finished in 13 professional fights while taking four straight UFC bouts to the cards.
When the Mederos vs Jones Market Resolves
The market resolves to the fighter officially declared the winner of the lightweight bout at UFC Fight Night: Hernandez vs. Rodrigues at Golden 1 Center in Sacramento on August 22, 2026. The main card opens at 8:00 PM ET on Paramount+ per ESPN, so the exact walkout time depends on where this fight lands in the running order. It is scheduled for three rounds. Both platforms resolve a draw or a no contest at 50-50 rather than voiding, which matters here given that Mederos's most recent fight ended in a draw. Kalshi keeps the market open through a postponement of up to two weeks and settles after the rescheduled bout; Polymarket resolves 50-50 if the fight slips past September 5, 2026.
Key Mederos vs Jones Catalysts
Reach and range: Jones holds a 4.5-inch reach edge (74 inches to 69.5) against a fellow orthodox lightweight of identical 5-foot-10 height.
Mederos has never been finished: 13 pro fights, zero losses by KO, TKO, or submission, and four straight UFC bouts to the scorecards.
Jones's finishing record versus his price: 8 KO or TKO wins and 3 submission wins in 18 victories, yet Jones by KO or TKO trades at only 19c.
The 59c distance prop: the market prices a 41c chance of any finish, split 26c KO or TKO and 15c submission, on Polymarket-only books.
Overnight stability: the favorite moved 1c across roughly 11 hours of captures, so any real move should show up on fight day, not before it.
Draw risk is live: Mederos drew with Chris Padilla in April 2026, and both platforms settle a draw at 50-50 rather than refunding.
Related Mederos vs Jones Markets
The Mederos vs Jones board is one leg of the Sacramento card. The main event is Anthony Hernandez vs Gregory Rodrigues, and the co-feature between Roman Dolidze and Reinier de Ridder sits directly above this fight on the main card. Further down the running order, Jamall Emmers vs Lerryan Douglas is the other fight worth pricing against this one, and every UFC and non-UFC board trading today is indexed on the sports markets hub.
Resolution Criteria
Resolves to the fighter officially declared the winner of the MarQuel Mederos vs Mason Jones lightweight bout at UFC Fight Night: Hernandez vs. Rodrigues, held at Golden 1 Center in Sacramento on August 22, 2026. The scheduled distance is three rounds, and the resolution source is official information from the UFC. Each winning contract pays $1 per share and the losing contract pays $0. If the bout is ruled a draw, a technical draw, or a no contest, both platforms settle the market 50-50 rather than voiding it. If the fight is postponed, Kalshi keeps the market open and settles after the rescheduled bout provided it takes place within two weeks; Polymarket resolves 50-50 if the fight is canceled or pushed beyond September 5, 2026.
Key Factors
- Jones holds a 4.5-inch reach advantage (74 inches to 69.5) at identical 5-foot-10 height
- Mederos has never been finished in 13 pro fights and is 4-for-4 going the distance in the UFC
- Jones is 18-2 with 8 KO or TKO wins and 3 submission wins, yet prices at only 19c to finish
- Polymarket-only method props: 59c distance, 26c KO or TKO, 15c submission, all on thin books
- Kalshi and Polymarket agree within 2c on the moneyline, so neither side offers a better number
- Draw risk is priced live after Mederos's April 2026 draw with Chris Padilla; both books settle a draw 50-50
What are the current Mederos vs Jones odds?
As of August 22, 2026, Mason Jones is the favorite at 77c on Polymarket and 76c on Kalshi, with MarQuel Mederos at 24c and 26c respectively. That is an implied win probability of roughly 77% for Jones.
Where can I trade the Mederos vs Jones market?
Both Kalshi and Polymarket list the fight. Kalshi runs it under the KXUFCFIGHT series with a contract for each fighter, and Polymarket lists it as a two-outcome market plus a set of method and round props. Combined lifetime volume on the board is about $77K.
Who is favored in Mederos vs Jones and by how much?
Mason Jones is favored at an average of roughly 76.5c across the two platforms, an implied 76.5% win probability. Jones is 18-2 with a 74-inch reach; MarQuel Mederos is 11-1-1 and unbeaten in four UFC appearances.
When does the Mederos vs Jones market resolve?
It resolves after the lightweight bout at UFC Fight Night: Hernandez vs. Rodrigues in Sacramento on August 22, 2026. The main card opens at 8:00 PM ET on Paramount+. A draw or no contest settles 50-50 on both platforms.
Will Mederos vs Jones go the distance?
The Polymarket distance prop trades at 59c, and Over 2.5 rounds prices at 65c, so the market leans toward all three rounds being completed. MarQuel Mederos has never been finished in 13 pro fights and all four of his UFC bouts reached the scorecards.
What should I watch before Mederos vs Jones resolves?
Watch whether the 19c Jones-by-KO-or-TKO prop moves on fight day, since the board currently pairs a 77c favorite with only a 41c chance of any finish. The moneyline moved just 1c across roughly 11 hours of overnight captures, so late money is the signal to track.