UFC Favourites vs Underdogs: Win Rates, Trends, and What the Record Means for Bettors

Editorial Team «bet on ufc Fights» May 29, 2026 Reading time: 9 min

The Numbers Behind the Odds: How Often UFC Favourites Actually Win

I spent the first three years of my MMA betting career doing what most punters do — backing the favourite in nearly every fight and wondering why my bankroll kept shrinking. The maths seemed obvious: favourites win more often, so bet favourites. The problem was that I never stopped to ask how much more often, and whether the odds already accounted for it.

In 2024, favourites won roughly 72% of all UFC bouts. That sounds like a safe strategy until you realise that a fighter priced at -300 needs to win 75% of the time just to break even. The market already knows favourites win most fights. It prices that in. Your job is to find the spots where the price is wrong — and the favourite-underdog split is the first place that mispricing reveals itself.

This article pulls apart a decade of UFC results, maps how favourite and underdog win rates have shifted over time, and lands on the practical question every bettor actually needs answered: at what price point does a favourite stop being worth the ticket? If you want to connect these numbers to a broader wagering framework, the UFC betting strategy guide builds on the principles laid out here.

A Decade of Data: Favourite and Underdog Win Rates From 2013 to 2025

Between 2013 and 2022, 1,462 underdogs won UFC fights. That figure alone tells you upsets are not anomalies — they are a structural feature of MMA. The sport is inherently volatile. A single clean shot, a slipped takedown, a scramble that goes wrong — any of these can overturn months of camp preparation and years of ranking advantage. No other major betting sport gives an underdog that many plausible paths to victory in a single contest.

Over the same period, the data from OddsTrader shows a clear accuracy gradient tied to the size of the odds. Heavy favourites priced between -400 and -900 won at rates between 88% and 93% — impressively consistent, but the payouts at those prices are tiny. The real action sits in the middle of the market. Fighters priced between +100 and -122 — the near-coin-flip range — won only about 51% of the time. That bracket is where the market struggles most to separate two evenly matched competitors, and it is where disciplined bettors find the most exploitable gaps.

What has remained stable across the decade is the overall favourite win rate hovering around 68-72%. It fluctuates year to year, pushed by things like changes in matchmaking philosophy (the UFC has periodically leaned toward “competitive” bookings versus “showcase” fights) and shifts in fighter development pipelines. But the central tendency holds. Favourites win roughly seven out of ten fights. The question is always whether the price you are paying reflects that ratio — or overestimates it.

The 2024 Underdog Surge: +200 Fighters at a Record 39% Win Rate

Last year threw a curveball that I have been pulling apart in my models ever since. Underdogs priced at +200 or higher — fighters the market considered clear losers — won 39% of their bouts. The historical average for that price tier sits around 28%. That is not a statistical wobble. That is a full eleven-percentage-point spike.

What drove it? Several factors converged. The UFC’s roster turnover accelerated, with more short-notice replacements and late-career veterans stepping in against rising talent. Short-notice fighters are typically given long odds because the market assumes preparation matters — and it does, but less than people think in a sport where one punch can end the contest. Meanwhile, the 2024 finish rate dropped to 45%, a decade low. More fights going to decision meant more rounds for the underdog to accumulate points, steal a round, and catch the judges’ favour.

For bettors, the 2024 data created a rare window. If you had been systematically backing +200 underdogs through the year, your return on investment would have been significantly positive — a situation almost unheard of in mainstream sports betting over a full calendar year. Whether that window remains open in 2025 and 2026 is an open question, but the structural factors (roster churn, matchmaking unpredictability, decline in finishes) have not disappeared.

The lesson I took from 2024 is not “always bet the underdog.” It is that MMA markets are less efficient than football or tennis markets, especially at the extremes. The further you move from the -150/+130 centre of the market, the more the odds rely on public perception rather than sharp modelling — and public perception in MMA is heavily influenced by name recognition and highlight reels.

How Accurate Are UFC Odds at Predicting Outcomes by Price Range

One of the first exercises I give anyone who asks me about MMA betting is this: plot the implied probability of each price bracket against the actual win rate. The result is a calibration curve, and in UFC markets, that curve has a distinctive shape.

At the heavy-favourite end (-400 and beyond), the market is well-calibrated. An implied probability of 80% maps pretty closely to an actual win rate of 88-93%. The market slightly underestimates these fighters, but the payouts are so slim that the edge is nearly impossible to exploit after the bookmaker’s margin is deducted. You would need to stake enormous sums to generate meaningful returns, and a single upset wipes out weeks of grinding.

In the moderate-favourite range (-150 to -300), the market is reasonably efficient. Win rates track implied probabilities within a few percentage points. This is the bracket that receives the most betting volume and the most analytical attention from sharp bettors, so the lines are sharpest.

The interesting zone — and the one I spend most of my time studying — is the slight-underdog to moderate-underdog range (+100 to +250). Here, the market consistently overestimates the favourite’s chances. The implied probability suggests the underdog wins 30-40% of the time; the actual rate sits closer to 35-45%. That persistent gap, compounded across dozens of fights per year, is where value lives. It is not glamorous. You lose more individual bets than you win. But the payouts on the wins more than compensate, provided you have the bankroll discipline to absorb the variance.

At the extreme-underdog end (+300 and beyond), the data gets noisy. Sample sizes shrink, and a single freak result can swing the numbers. I treat this bracket with caution — there is occasional value, but the variance is punishing, and the market’s mistakes here are harder to identify consistently.

Where the Numbers Leave You as a Bettor

Nine years of tracking these splits has taught me that the favourite-underdog breakdown is not a betting strategy in itself. It is a lens. When I open a UFC card and scan the odds, the first thing I do is categorise each fight by price bracket. Any favourite priced beyond -300 goes into a “probably skip” pile unless the method-of-victory market offers better value. Any underdog between +130 and +250 gets a closer look, because that is the bracket where the market’s errors are most frequent and most exploitable.

The 72% favourite win rate in 2024 means that blindly backing favourites is a losing strategy after the vig is factored in. The 39% win rate for +200 underdogs in the same year means that blindly backing underdogs is also unprofitable in most circumstances — but less unprofitable than most people assume. The edge, as always, is in the gap between what the market implies and what the data supports. That gap is wider in MMA than in almost any other sport I have studied, and it is the reason I have spent the last nine years in this niche rather than migrating to football or horse racing.

Written by the editors at bet on ufc Fights.