Who's on Second: Lineup Maker

Who's on Second

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About this app

The baseball and softball lineup maker built for Little League, rec, travel ball, and fastpitch coaches. Drag players onto the diamond, auto-generate a fair lineup in one tap, and track pitch counts and playing time all season.

Print a clean baseball or softball lineup card, keep the batting order rotating fairly, and know who can pitch before you fill out the card. Everything works on your phone from the dugout.

LINEUP BUILDER
Build lineups with drag-and-drop on a visual baseball diamond. Assign players to positions inning by inning, set your batting order, and mark absent players. Tap a position to quick-assign, or let auto-generate build a compliant lineup in one tap. Everything updates in real time: batting order, position summary, and rule compliance.

AUTO-GENERATE
One tap builds a full lineup that respects your league's rules, your batting order, and your fairness history. Handles minimum play requirements, position limits, pitcher eligibility, and more. You can always adjust the result by hand.

PITCH COUNT TRACKING
Log pitch counts after each game. Rest day calculations happen automatically based on your league's thresholds. Ineligible pitchers are flagged before you build your next lineup, so you never have to wonder who's available. Tracks pitches thrown on other teams too, because rest days don't reset when a player plays travel ball on Tuesday.

CONFIGURABLE RULES ENGINE
Every league is different. Set your own rules for minimum play, consecutive bench innings, infield requirements, pitcher limits, designated hitter, and more. Rules show real-time warnings in the lineup builder. They're guardrails, not hard blocks: you always have the final call.

FAIRNESS SUMMARY
See who played where and how much across the entire season. Per-player innings played, innings sat, position distribution, and pitching totals. When a parent asks about playing time, you've got the answer.

SET LINEUP (SEASON BATTING ORDER)
Set your batting order once. After each game, mark who batted last. The rotation handles itself for the next game, so every player moves through the order fairly over the course of the season.

PRINTABLE LINEUP CARD
Print a clean lineup card that fits one page. Absent players listed separately. Bring it to the dugout or hand it to the umpire.

TEAM ROLES
Invite assistant coaches, scorekeepers, and parents. Each role sees only what they need. Parents get read-only access to their player's position history and pitch count status. Coaches and scorekeepers can enter pitch counts and manage lineups based on their role.

WORKS AT EVERY LEVEL
Little League, rec, travel ball, high school, adult leagues. The rules engine is fully configurable, so it adapts to your league instead of the other way around.

BUILT FOR THE DUGOUT
Responsive design that works on phones, tablets, and laptops. Build your lineup on Saturday morning from the bleachers, adjust it in the parking lot when someone no-shows, and pull it up on your phone between innings.

Terms of Use: https://whosonsecond.com/terms
Privacy Policy: https://whosonsecond.com/privacy

WORKS FOR YOUR SEASON
Little League, rec ball, travel ball, select, middle school and high school — baseball, fastpitch and slowpitch softball. Use it as a lineup builder when you want to place every player yourself, or as a lineup generator when you want a fair batting order done in one tap.

What’s new

A second set of eyes on every lineup card before it leaves the dugout.

Start from your state's rules: pick your state and division, then apply its rules in a tap.

Before you share, print, or mark a lineup ready, the app lists any issues, so you catch them before the umpire does.

Player photos come in upright and can be cropped, and two coaches can compare a lineup inning by inning.

Raked the mound, filled the cooler, asked the foul pole to pick a side. Small fixes and polish under the hood.