Methodology and model card
Defines input categories, the 50–100 directional confidence score, current-data behavior, known failure modes, and version history.
Public source index
Evidence before assertion.
A citation-ready index of the public documents that define Propeller’s player-prop research, data, calculators, and limitations. Each source stands on its own; this page makes the relationships easier to check.
What this page is
A public evidence map—not a performance claim.
Use this hub to find the source that defines a product fact, metric, rule, or limitation. It does not replace the linked source, and it does not turn historical records into a forward-test, ROI, profit, or profitability claim.
Propeller is an independent research tool. It is not a sportsbook, does not accept wagers, and does not build or submit DFS entries.
- 01Choose the sourceUse the page or JSON file that owns the fact you want to describe.
- 02Keep its boundaryQuote the scope, date, and limitation with the claim—not only the favorable detail.
- 03Check for changesFor time-sensitive information, follow the source date or version and verify the current platform rule.
Six source families
Where each kind of evidence lives.
Historical archive and data definitions
Explains raw graded analysis rows, current collapsed-ledger entries, source APIs, and why aggregate records are not a uniquely published forward-test or ROI claim.
Read results archive · Read grading method · Public data catalog
Publication-capture record
Documents the fields captured when a public research row is first observed. The record explicitly does not verify event-start ordering or outcome timing.
Calculator logic and rule sources
Shows each calculator’s inputs and outputs. The platform’s current rules and entry screen control; calculators are explanatory tools, not a guarantee of a platform payout.
PrizePicks calculator · Underdog calculator · Pick6 calculator
Editorial and corrections policy
Sets the source preference, independence, disclosure, and correction process for public product and research pages.
Product boundary
Explains the difference between evaluating one player line and building an entry. Propeller provides analyzer research, not an optimizer or execution layer.
Calculator source register
A calculator is only as current as its platform rule source.
| Calculator | Inputs / output | Official rule source | Boundary |
|---|---|---|---|
| PrizePicks payout calculator | Selected configuration and entry amount → illustrative payout calculation | PrizePicks payouts | Review the individual details screen before submitting; platform terms control. |
| Underdog payout calculator | Selected configuration and entry amount → illustrative payout calculation | Underdog Standard/Flex payouts | Rules, availability, and entry terms can change; check the current platform disclosure. |
| DraftKings Pick6 calculator | Selected configuration and entry amount → illustrative payout calculation | DraftKings Pick6 rules and scoring | Regional and contest conditions can apply; check the current platform terms. |
Official source links were checked July 25, 2026. Each calculator page carries its own source note. A platform can change a rule, payout, or availability after that date; the current platform page and entry screen are authoritative.
Use with care
A short checklist for accurate citations.
Include the unit and date
Use the data source’s own date, version, and definition. Do not quote an aggregate without its raw-row, ledger, or scope qualification.
Keep confidence in scope
Directional confidence is not a calibrated probability, accuracy rate, expected value claim, or guaranteed result.
Keep the record in scope
The publication-capture ledger is not proof of pre-event ordering, outcome timing, ROI, profit, or profitability.
Prefer the primary page
Link to the source page or JSON file that owns the fact. Corrections can be requested through the editorial policy.
Explore the product boundary
Research one player line at a time.
See the free public analyzer and the plain-language explanation of what it does—and does not—do.