Coming soon — 2026 season
Baseball, priced like
a market should be.
OnBase simulates every MLB game pitch by pitch — real physics, real weather, real ballparks — then shows you exactly where the books are wrong. And grades itself in public.
OnBaseHow the engine works — not a performance promise
What's inside
A trading desk, not a tout
No locks. No hammer plays. Fair probabilities, transparent reasoning, and a ledger that keeps the score honest.
The Edge Board
Every market on the slate with our fair probability next to the book's price. Sorted by edge, sized by confidence — the number first, the reasoning one click away.
- Fair price vs. book price
- Expected closing-line value
- Confidence-graded calls
Calibrated honesty
When OnBase says 62%, it hits about 62% of the time — and we publish the proof. Brier score, calibration error, and CLV on every graded call, updated live.
- Public accuracy ledger
- No deleted losses
- CLV-graded, not cherry-picked
Ballparks, modeled for real
Ball flight simulated through tonight's air — temperature, humidity, altitude, and wind resolved per field. Coors in dry air is a different sport. We price it that way.
- Per-batter park factors
- Wind resolved per field
- Physics, not static multipliers
Be first on the board
Early list members get first access when the doors open — before the public launch.