Key takeaways
- A card lists the bouts at a combat-sports event: a main event plus an undercard, which may be split into a midcard and a lower card.
- Promoters schedule bouts in ascending order of importance, so the running order is itself a ranking.
- Undercard bouts in boxing usually run four to eight rounds, scaled to the experience of the fighters, with ten for advanced non-title bouts.
- An undercard has two jobs: developing fighters in front of an audience, and protecting the event if the main event ends quickly.
- Matchmaking is constrained before it is creative - weight, licensing and availability rule out most theoretical pairings before style is even considered.
A card is the list of bouts at a combat-sports event. It has a main event at the top and an undercard containing everything else, and that undercard is often subdivided into a midcard and a lower card according to how important the matches are thought to be. Promoters schedule the bouts in ascending order of importance, so the evening builds.
That is the vocabulary. The interesting part is that a card is not a schedule that someone filled in — it is a set of constraints that someone solved.
The anatomy of a card
The main event. The headline bout, last on. It is the reason most of the audience is there and it carries the event commercially.
The co-main event. Second from the top. In practice this is the card's insurance policy: a bout good enough to carry the evening if the main event disappoints or falls out.
The midcard. Established fighters who are not yet headliners, or headliners on the way back down. Often the most competitive matchmaking on the card, because neither fighter is being protected.
The lower card or prelims. Developing fighters. Promoters intend the undercard to give fans a look at up-and-coming fighters, or at fighters not as well known as their counterparts in the main event.
The running order is therefore a ranking, published in public, every time an event happens. Where a fighter is placed on a card is a statement about where the promoter thinks they are.
Round lengths are a status marker
In boxing, bout length scales with experience rather than with preference, and undercard bouts usually run between four and eight rounds.
| Level | Typical scheduled rounds |
|---|---|
| Entry level, often professional debuts | 4 |
| Intermediate | 6 to 8 |
| Advanced, non-championship | up to 10 |
| Championship | 12 |
Read a card with that in mind and it becomes legible without knowing any of the names. A six-rounder early in the evening is a developmental fight. A ten-rounder in the midcard is two fighters who have arrived and are being tested.
There is a practical reason for the scaling beyond ceremony: an inexperienced fighter in a long fight is an injury risk, and a four-round fight limits the damage a bad matchup can do.
Why the undercard exists
Two jobs, and both are real.
Development. Fighters need rounds in front of an audience, and no developing fighter can sell a room on their own. The undercard borrows the main event's crowd.
Insurance. If the main event ends quickly, the audience has still seen a full evening. A card with nothing beneath the headline is an event that can be ruined by a first-round knockout — which is an outcome the promoter has no way of preventing and every reason to hedge against.
What actually constrains a matchmaker
Most fantasy matchmaking starts with style and finishes with drama. Real matchmaking starts with what is possible and works inward, and the constraints knock out most options before anyone considers whether a fight is interesting.
- Weight. Fighters compete in classes with defined limits, and the divisions are the first filter applied to any pairing. Two fighters separated by two divisions are not a matchup; they are a hypothetical. MMA weight classes sets out the divisions and how catchweight bouts work.
- Availability and recovery. A fighter who competed six weeks ago is not available, whatever the card needs.
- Standing. Matching an unbeaten prospect against a ranked veteran too early is how you end a prospect. Matching them too late is how you produce a record that means nothing, as how boxing records work describes.
- Stakes. A title eliminator has to be between two people whose credentials make the winner a credible challenger.
- Style. Last, and the only one most fans start with. It decides whether the fight is entertaining, not whether it can happen.
Any matchmaking system that reverses this order will generate pairings that look spectacular on paper and could not exist.
Matchups the app will refuse to make
40-0 MMA & Boxing Fight Draft builds matchups from the stable you have drafted, and it applies the same order of constraints — which means it will sometimes decline to make the fight you want.
The constraints it enforces are weight class first, then standing within the rankings, then style, and the weight-class rule is a hard refusal rather than a penalty. If you have drafted a heavyweight and a flyweight and you want to see them fight, the app will not produce that bout. It is not a difficulty setting or a paywalled feature; the pairing is not available.
We considered allowing it with a large disadvantage applied, and rejected the idea for a specific reason. A model that will produce any matchup is implicitly claiming it can evaluate any matchup. Ours cannot, honestly, evaluate a cross-division bout between fighters who would never share a ring, because there is nothing to calibrate that against. Refusing the pairing is more truthful than returning a confident number.
The second constraint, standing, is softer. The app will match fighters at different points in the rankings, but GM Mode moves contenders toward title shots through a progression, and a signing who jumps several places in one bout is a decision the ranking responds to rather than absorbs.
The consequence at the draft board is that weight-class spread is not decoration. A stable clustered in one division fights the same small pool repeatedly. A stable spread across divisions has more available matchups, which in GM Mode means more paths to a title. That is the practical argument in MMA fantasy draft strategy, and it is why weight coverage tends to beat raw fighter quality over a long run.
The game's fighter pools are built from real fighters' careers, with ratings and records that are the game's own estimates; it is not affiliated with, endorsed by or licensed by any promotion, sanctioning body, event or athlete. The studio's other sports and management titles are listed under sports GM.
Good to know
Frequently asked questions
What is a fight card?
What is an undercard?
Why are undercard bouts shorter?
Who decides the running order?
Why does an event need a long undercard at all?
Sources
- Card (sports) (opens in a new tab)Wikipedia — accessed
- Weight class (boxing) (opens in a new tab)Wikipedia — accessed
League, team and athlete names appear here only to identify the rules, records and history being discussed. Reign Creative LLC's sports games are not affiliated with, endorsed by or licensed by any league, team, players' association or athlete, and all names and marks belong to their owners.
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