Sport playbook

MMA playbook

Two fighters, fight-week news, and what to check first · 8 min read

MMA can look like tennis with gloves: two people, one winner. But each fighter has few fights on record, a card can change in the final days, and one punch can end it. This playbook is the MMA layer on top of Levels 1 to 3.

How the fight market works

Lines usually open weeks before an event and firm up as money arrives and fight-week news comes in (see What happens to a line until kickoff; on a card, most fights' start times are estimates). Books usually take smaller bets on fights than on the big team sports, so modest respected money can move a line, and the moves are worth reading.

Few fights, wide doubt. A fighter often competes only about twice a year, against very different opponents, so a record is a small sample and any rating carries more doubt than a team rating does. Judge yourself by closing line value, not one event.
Headline fights are the hardest to beat. Main events and title fights draw the most money, and their closing lines are the most tested prices on a card. Fights lower down can be priced further off, with thinner information on both fighters.

The moneyline

The moneyline, who wins the fight, is the core market. To remove the vig, add the two implied chances and take half the extra off each side, as in the CLV lesson.

Big favorites still lose. A favorite at −400 must win more than 80% of the time to profit, and even at a fair price it loses one fight in five (see Why a 70% win rate can lose money).
Draws are rare but possible. On a two-way moneyline a draw is usually a push or no action, so your stake comes back; some books offer a three-way line instead, where a draw loses bets on either fighter. A no contest, a fight with no winner, for example after an accidental foul early on, usually voids moneyline bets too.

Fight week

Weigh-ins. Fighters usually weigh in the day before. A fighter who misses weight often fights anyway, with a penalty. Read a miss as a question, not an answer: it can mean a draining cut or simply a bigger fighter on the night, and the line often moves before you can bet it.
Short-notice replacements. A replacement may step in days or weeks out, with less time to prepare and to make weight. That matters, but it is an obvious fact about the fight, and usually priced.

Cancellations and replacements

This is the MMA settlement trap. Fights fall off cards late, sometimes on the day, and a bet is on a named matchup. At most books:

A cancelled fight voids bets on it, and stakes come back.
A new opponent voids bets on the old matchup, even on the fighter who stayed. Your old price does not move to the new matchup.
A fight moved to another date or event stays live at some books if it happens soon after, and is void at others.
A missed weight voids nothing if the fight goes ahead.
A change in scheduled rounds often voids rounds bets.
The official result announced at the event settles the bet; a later change, like a win overturned to a no contest after a failed drug test, usually does not.

Rules differ by book and by market, so read them before you bet. In a parlay a void leg usually drops out and the rest pays at a smaller price. As with retirements in the tennis playbook, the house rule can matter as much as your read.

Styles and matchups

Fights are matchups, not just ratings. A striker who keeps the fight on the feet is in a different fight from one who gets taken down, so ask whose fight happens: can the wrestler get it to the mat? Reach matters through what it lets a fighter impose. Age and activity matter too: decline can come quickly in a combat sport, and a long layoff leaves less recent evidence. All of this is public, so ask whether the price already reflects it. Slogans like “wrestling beats striking” are easy stories, and easy stories are usually priced: treat them as questions to check, not patterns to bet.

Method of victory and rounds

Method of victory: a fighter to win by KO/TKO, by submission or by decision. A fighter's three method prices are pieces of that fighter's moneyline, and together they usually carry much more vig, as the example shows.
Goes the distance: yes if the fight reaches the final bell and goes to the judges, no if it ends inside the distance. Check how your book settles a technical decision, a fight stopped late by an accidental foul and sent to the judges.
Over/under rounds: an over/under of 2.5 rounds means halfway through round 3: with five-minute rounds, 12 minutes 30 seconds of fighting. The over needs the fight to go past that mark; a stoppage before it is under. Check how your book settles a stoppage right at the mark.
Round betting: a fighter to win in a given round. Long prices leave room for a lot of vig, so add up the implied chances of the whole set before you bet one.

A method bet needs the winner and the way, so it rests on how you divide a win chance into pieces. Compare each bet's fair chance with what its own price needs, never a win chance with a method chance.

Judging

In most promotions, including the UFC, three judges score each round, usually 10-9 to the fighter who wins it and 10-8 for a dominant one, and add the rounds up. Win two rounds 10-9, lose one 10-8, and that judge has it 28-28. Tight rounds can go either way and judges can disagree, which is how a split decision happens. If you expect a decision between two well-matched fighters, part of your bet rides on how tight rounds are scored; leave room for that doubt rather than assume the judges have a pattern you can bet.

Three rounds or five

Most fights are scheduled for three five-minute rounds; title fights and most main events go five. Two more rounds mean more time for a stoppage and for fitness to show, and they change every rounds market: going the distance means 25 minutes, not 15. A fighter who has never fought past round 3 is an open question, not an answer either way.

Parlays

Card parlays, several fighters from one event, are popular, and the vig compounds across legs. Fights on one card are separate contests and mostly independent; the hidden risk is a shared misread, like one wrong belief about how a style matchup plays out, repeated in several legs. Same-fight parlays are different: their legs are often correlated. A fighter to win by KO/TKO and under 1.5 rounds both ride on an early stoppage, and the book prices that in and keeps more than on a single bet. Read the parlays lesson first, and stake any parlay smaller than a single bet.

A pre-bet checklist

Is the fight still on, against the same opponent? Check the news and the weigh-ins.
How does your book settle a cancellation, a new opponent, a draw or a no contest in this market?
Three rounds or five?
Whose fight happens? And does the price already reflect it?
Which market fits your read? Compare each bet's fair chance with what its own price needs.
What has the line done since it opened, and why? (Why lines move)
Have you shopped the price? Compare books first (Line shopping).
Is the stake small? One shared misread behind several bets can sink a few at once, so size for a bad week (Variance and drawdowns).

How Consensus Edge helps

We compare prices across many sportsbooks and remove the vig, so you can see what the market really thinks and where the best price is. We blend Square (the books), Sharp (our models) and, where available, Crowd (prediction markets) into one chance, and we re-price regularly before each fight, so line moves after weigh-in and fight-week news reach our numbers, though right after news any board, ours included, can trail the books. Each bet shows BET, LEAN or NO EDGE; BET and LEAN carry a small suggested stake, and we publish how our picks did against the close. NO EDGE is not a grade: it means a fair price, or a market we don't grade. Start on the slate or read how it works, and bet only what you can afford to lose.

Example. One fight, broken into pieces (illustrative prices, not live data). The moneyline is Fighter A −250, Fighter B +200. Those imply 71.43% and 33.33%, together 104.76%. Take half the extra, 2.38, off each side, as in the CLV lesson, and A's fair chance is 69.05%, B's 30.95%. Even at that fair chance, A at −250 is worth 0.6905 × $40.00 − 0.3095 × $100, about −$3.33 per $100: that is what the vig costs on this side.

The method market prices six outcomes: A by KO/TKO +150 (40.00%), by submission +400 (20.00%) and by decision +250 (28.57%); B by KO/TKO +400 (20.00%), by submission +1200 (7.69%) and by decision +700 (12.50%). Those six add up to 128.76%, against 104.76% for the two moneyline prices, so the pieces carry far more vig. A's three pieces alone imply 88.57% for a win the moneyline prices at 71.43%. Back all three in the right proportions and you have bet A at about −775 instead of −250. (A draw or no contest is rare and left out here; check how your book settles one.)

Removing the vig from six prices is less simple than from two: taking a sixth of the extra off each would cut B by submission from 7.69% to 2.90%. So here the fair chance is your own assumption. Say you accept A's fair win chance and think B is hard to stop, so you put A by decision at 33% of all outcomes. +250 needs 28.57%, and a $100 bet is worth 0.33 × $250 − 0.67 × $100, about +$15.50. That is a big edge, rare in practice, and it rests on one input: take a third of the extra on A's pieces off each, and the market has A by decision near 22%, 11 points below yours. At 28.57% the bet is worth nothing; at 26% it is worth 0.26 × $250 − 0.74 × $100, about −$9.00. A shift from 33% to 26% in how you divide A's win chance turns a strong bet into a poor one, so treat an apparent big edge on a method price as a reason to recheck your input, not a reason to bet more.

Key takeaway. In MMA the matchup, the scheduled rounds and the house rules shape every bet, so confirm the fight is still on as booked, know how your book settles a change, compare each market with what its own price needs, shop every bet, and judge yourself on the close.

Terms in this playbook

Line Movement Closing Line Moneyline Implied Probability Push Vig Over/Under Same-Game Parlay Correlation Square Sharp Crowd BET LEAN NO EDGE