Help
Short answers, each with the page that has the detail.
How do I find a player?
Press / or ⌘K anywhere, or use the search page. Names are forgiving — accents, nicknames and small typos still match — and two players with the same name are listed separately.
Open search →Which sports and years are covered?
NFL, NBA, MLB, NHL and MLS. Coverage years differ by sport and by stat; some early stats were never recorded, and those show as missing rather than zero.
Coverage by sport →Where do the numbers come from?
Named sources, listed with what each covers. Where a record depends on a few plays, the league's official season line wins over a play-by-play sum.
Methodology →A stat looks wrong. What do I do?
Report it from the page it is on. Every correction we make is published with the before, the after and the source.
Corrections ledger →What is VAL?
A single value scale for every player-season, so careers can be compared across eras and sports. The glossary explains it and every other metric we use.
Glossary →What are KC and KV?
The Knox ratings: Knox Current (who a player is right now) and Knox Value (what a career has built).
About Knox →How does Beat the Vault work?
Each week, call which way a player's rating moves and how sure you are. Picks settle on Monday and are scored for accuracy and calibration.
Weekly Vault →Can I use the data in my app or site?
Yes — a JSON API, an embeddable widget and an MCP server for AI agents. An API key is optional and raises your limits.
Developer docs →How do I cite a page?
Player and board pages carry a cite bar with a ready-made citation and a link to the page's JSON.
Sourcing and reuse →