For fans who always ask “but why?”

Build a team you’d defend tomorrow.

Start curiousNo cap-law degree needed
Use real contextNBA · NFL · MLB
Leave with an opinionThen test it
No suit required

Sports get better when you can see the trade-offs.

Moneyballin is where the group-chat argument meets the cap sheet. Follow the money, make the call, and find out whether your big idea still looks smart after the excitement wears off.

How can you not get romantic about baseball?

Moneyball (2011) · numbers still belong to people
Follow the money
See what a player costs, what the market says they’re worth, and why a “good player” can still be a hard contract to carry.
Make the call
Trade the pick. Keep the kid. Pay the star. Let them walk. There usually isn’t one clean answer—only a choice you can explain.
Live with the outcome
A move is more than a grade on trade night. Run a franchise and see how today’s clever shortcut becomes next season’s problem.
Pick a door

Where do you want to start?

There’s no required reading order. Chase the question that brought you here, whether it’s a bad contract, a wild trade idea, or the belief that you could run this team better.

A good first visit

Give it twenty minutes.

You don’t need to learn everything at once. Start with one player, one decision, and one honest reaction to the result.

1
Find a player you know
Open Valuation Lab and see how their production, age, and contract fit together. Agree with the grade—or don’t.
2
Build the trade in your head
Put it into Trade Grader. Add the pick you hoped nobody would ask for. See where the deal starts to hurt.
3
Take responsibility
Run the team in GM Simulator and discover the oldest front-office truth: every answer creates the next question.
Make the desk yours
Create an account when you want a name on the door. You can also wander around first—no clipboard at the entrance.
Stuck? Start with someone you love.
Look up your favorite player’s contract. It’s easier to understand surplus value when your own bias is sitting at the table.
What the real offices are talking about

Around the business

A few current headlines for your next rabbit hole, trade-machine spiral, or suspiciously detailed group-chat message.

Player Contracts

Valuation Lab

The core teaching tool: each grade compares current pay with a position-relative market estimate. The model weighs production standing, overall and outside position rankings when available, age curve, and each league's salary market. An A requires meaningful dollar surplus, not just a cheap deal.

Player Team Age Pos Rank Seasons Stat line Salary Expected Surplus Grade Verdict
Deal Building

Trade Grader

Build a deal, compare outgoing salary against outgoing value, and check whether the package still looks like a real historical trade in that league.

Players to send
Players to send
Franchise Mode

GM Simulator

Choose a real team and run a front office. Make trade, free-agency, and draft decisions, then simulate time week by week or month by month to see whether your process actually builds a healthier franchise.

Roster Pos Salary Expected Grade
Decision Reps

GM Quiz

Multiple-choice reps for cap management, surplus value, and roster-building logic. Answer the questions, earn a Moneyballin GM grade, then pressure-test your thinking with the AI GM Companion.

Strategy guidance, not live transaction reporting. Press Ctrl/⌘ + Enter to send.
League Context

Cap Watch

Use this as the context layer behind every quiz question and every trade. Front offices never operate in a vacuum.

Your Profile

Account

Accounts are optional. The AI GM Companion and the rest of the front-office tools are open to everyone.

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