Co-ed League Configuration

Co-ed leagues require a minimum number of each gender on the field every inning. The lineup generator supports these rules so you can generate lineups that comply with your league's requirements automatically.

What the Tool Supports

The co-ed configuration has three settings:

Enable Co-ed League toggle
Minimum female players required per inning (fielding positions)
Minimum male players required per inning (fielding positions)

These minimums apply to defensive positions only. The algorithm enforces them every inning when generating your lineup.

Enabling Co-ed Mode

Step by Step

In the lineup generator, go to the league settings
Toggle Co-ed League to on
Set the minimum female players required on defense each inning (for example, 3)
Set the minimum male players required on defense each inning (for example, 4)
Make sure each player on your roster has their gender set
Generate your lineup as usual

The algorithm handles the rest.

Setting Player Gender

Each player on your roster needs a gender assigned for co-ed rules to work. This is set when you add or edit players in your roster.

Premium users: Gender is part of your saved team roster and carries over to every game.

Free/public version: Gender is set during roster entry each time you use the tool.

How the Algorithm Handles Co-ed Rules

When co-ed mode is enabled, the algorithm follows this process each inning:

Select required female players first: The algorithm picks the required number of female players using the same playing-time fairness scoring as the rest of the lineup. Female players with fewer innings played get priority, just like any other player.
Fill remaining spots by best score: After the required female slots are filled, the remaining defensive positions go to whichever players have the best playing-time score, regardless of gender.
Male minimums checked: The algorithm verifies the minimum male requirement is also met. In most cases this happens naturally since the remaining spots fill with the highest-scoring available players.

This means the co-ed rules work alongside the fairness algorithm, not against it. Female players are not stuck playing every inning just because they are female (unless the roster only has the exact minimum number of female players).

When There Aren't Enough Players of a Gender

If your roster does not have enough players to meet the minimum requirement for a gender (for example, the league requires 3 female players but only 2 are available for the game), the algorithm logs a warning and continues with all available players of that gender. It will not fail or refuse to generate a lineup. You will see the warning and can decide how to handle it with your league.

Gender Batting Order Rule

The co-ed settings include a toggle for a gender-based batting order rule in the UI. It is important to be transparent: this toggle is not currently implemented in the engine. Turning it on will not change how the batting order is generated. The batting order is built using the same logic as non-co-ed lineups (randomize, drag-and-drop reorder, or All Players Bat).

If your league requires alternating genders in the batting order, you will need to manually reorder the batting lineup after generation using drag-and-drop.

What Is NOT Supported

To set clear expectations, the co-ed configuration does not include:

Position-specific gender rules (e.g., "pitcher must be female in odd innings")
Alternating gender batting order enforcement in the engine
Per-inning gender overrides
Gender-based position templates

The tool handles the most common co-ed requirement: minimum players of each gender on the field every inning. For anything more specific, generate the lineup and make manual adjustments.

Coaching Tips for Co-ed Teams

Build Your Roster with Flexibility in Mind

If your league requires 3 female players on defense, aim for at least 4 or 5 on your roster. Having just the minimum means those players must play every inning with no rest, which leads to burnout and creates problems if someone misses a game.

The same applies to male minimums. Having a player or two above the minimum for each gender gives the algorithm room to balance playing time fairly.

Communicate Gender Requirements to Parents

At the start of the season, explain the league's co-ed rules to all parents. Be clear about what they mean in practice:

If only 3 female players are on the roster and the minimum is 3, those players will play every inning
If one gender is significantly overrepresented, players of that gender will rotate bench time more frequently
The algorithm treats everyone fairly within the constraints, but the constraints themselves create differences

Parents handle these situations much better when they understand the math upfront.

Rotate Positions Across Games

Even if a female player must play every inning due to roster constraints, you can still vary their experience by giving them different positions each game. One game they play shortstop and first base. Next game they play outfield and third base. This keeps development well-rounded even when playing time is maxed out.

Handle Imbalanced Rosters Honestly

If your roster has 9 boys and 3 girls with a 3-girl minimum:

The 3 girls play every inning (no bench time)
The 9 boys rotate, each playing about 6 of 9 available boy-slots per inning
This is not unfair. It is the math of the roster you have.

If the imbalance is severe (e.g., 11 boys and 2 girls with a 3-girl minimum), talk to your league about whether exceptions apply. Some leagues allow reduced minimums when rosters genuinely cannot meet them.

Develop All Players Regardless of Gender

Do not let co-ed rules turn into a situation where female players are always in the outfield or male players always pitch. The lineup generator assigns positions based on preferences and playing-time fairness, not gender. Set diverse position preferences for every player and the algorithm will spread positions around.

Learn strategies for coaching co-ed teams:

Softball Lineup Creation - Lineup strategies (many co-ed teams play softball)