Dark Horse

What is a dark horse in MMA?

A dark horse is a fighter that few people expect to make noise, not because of a lack of ability, but because there isn’t much footage or history on them yet. The label shows up most often in formats where several fighters are chasing the same prize: a division’s rankings, a year-end breakout list, or a tournament bracket. That’s different from a single scheduled fight, where oddsmakers set a clear favorite and underdog based on known form.

The idea borrows its logic from horse racing, where an entrant with no recorded results was hard to price, so bettors called it “dark” in the sense of unknown rather than unlucky. Applied to a fighter, the label says less about skill level and more about how little the wider public has seen of them.

A dark horse might be a regional prospect making a promotional jump, a veteran who just moved weight classes, a late replacement dropped into a tournament bracket on short notice, or someone coming off a long layoff with no recent tape to judge. Once tape exists and fans have had a real look, that fighter usually stops getting called a dark horse, win or lose.

Where the term comes from

The phrase predates MMA by close to two centuries. Horse racing bettors in early 19th century Britain used “dark horse” for an entrant with no public racing history, which made it hard to set fair odds. Novelist and future UK prime minister Benjamin Disraeli is credited with popularizing the phrase in his 1831 novel The Young Duke, describing a horse that surged past the field despite never having been considered a contender.

From there, it moved into politics, most famously with James K. Polk’s surprise 1844 presidential nomination. It later spread through general sports writing before landing in MMA commentary and rankings discussion.

Dark horse vs. underdog

The two terms overlap enough that broadcasters often use them as if they mean the same thing, but they answer different questions. Underdog answers “who’s less likely to win this fight?” Dark horse answers “who could go further than anyone expects across a whole tournament or division?”

A fighter can be both at once. A fighter can also be a heavy underdog in one specific bout without qualifying as a dark horse at all, if everyone already knows exactly what they’re capable of.

	Dark horse	Underdog
Applies to	A tournament, division, or ranking conversation	A single scheduled fight
What’s known	Limited tape or history, hard to evaluate	Well scouted, just priced lower
Odds	May not have a line yet, or carries long futures odds	Has a specific moneyline, marked with a plus sign
What it signals	Real but unproven upside	Lower probability of winning this matchup

How the term is used in MMA

In tournament brackets

Format matters here. Standard UFC cards run one fight at a time, so “dark horse” shows up most in formats built around brackets. The PFL runs its season as an eight-fighter tournament per weight class, and Sherdog runs a recurring feature naming a dark horse for each bracket ahead of every event.

Heading into the 2025 PFL World Tournament welterweight semifinals, Sherdog tagged Masayuki Kikuiri, a fighter on a four-fight win streak but grouped with former Bellator champion Logan Storley and two other established names, as “the pure definition of a dark horse” in that bracket. Sullivan Cauley, a wrestler making his promotional debut after two years out of action, got the same label heading into his light heavyweight quarterfinal against Marcelo Nunes.

In prospect rankings and divisional talk

Outside of brackets, fighters pick up the label when someone maps out an entire division and names someone who doesn’t belong on the radar yet. UFC.com’s “Fighters on the Rise” series for 2026 tagged bantamweight Charles Jourdain a dark horse for the year, describing a division that’s “flush with talent” even as Jourdain looked ready to break through it. Former UFC flyweight champion Demetrious Johnson used the same word for Reece McLaren, a fourth-ranked ONE Championship flyweight, saying he’d always seen McLaren as “a dark horse in the flyweight division.”

Common misconceptions

A dark horse tag doesn’t mean a fighter lacks talent. It means the wider audience hasn’t caught up to what that fighter can do, which is a different problem entirely. The word “dark” has nothing to do with fighting style or intent either; it points back to unknown form on the racetrack, not anything sinister in the cage.

The term also isn’t a strict synonym for underdog, even though the two get swapped constantly in fight coverage. An underdog can be a well-known fighter who’s simply outmatched on paper for one bout. A dark horse is closer to a wildcard: someone whose ceiling hasn’t been tested in public yet.

Frequently Asked Questions

Is being called a dark horse a compliment in MMA?

Generally yes. It signals a fighter has real tools even though the wider audience hasn’t caught on yet, which is different from being written off as overmatched.

What’s the difference between a dark horse and a sleeper pick?

The two terms get used interchangeably in most MMA and betting writing. Some writers reserve “sleeper” for a specific betting angle and “dark horse” for a broader tournament or divisional pick, but the split isn’t standardized across the sport.

Can a former champion be called a dark horse?

Rarely. The label depends on being under-scouted or overlooked, which usually rules out anyone with a well-documented title run, even one coming back from injury or retirement.

Does a fighter have to be unranked to be a dark horse?

Not necessarily. A dark horse can sit outside the rankings entirely, like a late tournament replacement or a fighter making a promotional debut, rather than simply being ranked lower than expected.

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Sources

1. Sherdog. “PFL 2025 World Tournament Dark Horse: Masayuki Kikuiri.” Accessed September 2026.
   https://www.sherdog.com/news/articles/PFL-2025-World-Tournament-Dark-Horse-Masayuki-Kikuiri-197267
2. Sherdog. “PFL 2025 World Tournament Dark Horse: Sullivan Cauley.” Accessed September 2026.
   https://www.sherdog.com/news/articles/PFL-2025-World-Tournament-Dark-Horse-Sullivan-Cauley-196818
3. UFC.com. “Fighters on the Rise 2026 | Part 1.” Accessed September 2026.
   https://www.ufc.com/news/fighters-on-the-rise-2026-part-1
4. Sportskeeda. “’A dark horse in the flyweight division’ – Demetrious Johnson says he’s ‘a big fan’ of ONE veteran Reece McLaren.” Accessed September 2026.
   https://www.sportskeeda.com/mma/news-a-dark-horse-flyweight-division-demetrious-johnson-says-he-s-a-big-fan-one-veteran-reece-mclaren
5. Britannica. “What Does It Mean To Be a Dark Horse? Meaning, Definition, & Idiom.” Accessed September 7, 2026.
   https://www.britannica.com/topic/What-Does-It-Mean-To-Be-a-Dark-Horse
6. Wikipedia. “Dark horse.” Accessed September 2026.
   https://en.wikipedia.org/wiki/Dark_horse
7. Legal Sports Report. “Betting 101: What Is An Underdog In Sports Betting?” Accessed September 2026.
   https://www.legalsportsreport.com/how-to-bet/underdog/

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