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As of 2026-09-20, 3 of the 4 leagues here had a board worth ranking: NFL (10), MLB (10), WNBA (10). NBA had nothing posted — between seasons, or ahead of the window in which books open a game’s markets. Each league page keeps its address in every month of the year, so a link to it is never a link to a page that stopped existing in the off-season.
Measured rather than assumed: the next fixture on the schedule and the most recent game in the box scores, per league, as of this build. A league can have a scheduled game months away and no board at all — the schedule carries next season’s opener on purpose.
| League | Board | Next scheduled game | Most recent logged game |
|---|---|---|---|
| NBA | no props posted | 2026-10-20 | 2026-06-13 |
| NFL | 62 props posted, 10 ranked | 2026-09-21 | 2026-09-18 |
| MLB | 2393 props posted, 10 ranked | 2026-09-21 | 2026-09-20 |
| WNBA | 544 props posted, 10 ranked | 2026-09-21 | 2026-09-19 |
One page per league, each rebuilt daily against whatever the books have actually posted. “Best” here means ranked highest by the model on the measured board — never a lock, never a guarantee, and always shown next to the sample size the ranking rests on.
It means the props the model ranked highest on the board the books had posted when the page was built: ordered by how far the player’s own game log sits from the posted price, shrunk toward a league prior so a short hot run cannot pass for a signal. The book’s margin is still in that comparison. It is a ranking of measured evidence, not a tip sheet, and nothing on it is a guarantee.
Once a day. The whole set is rebuilt from the live board each morning, so the ranking on the page is dated and says so. The prices, the books and the current order load live underneath it, because those move through the day and a cached copy of a price corrects itself for nobody.
Because the books have posted nothing for it. Two of the four leagues are out of season for months at a time, and even in season the props for a given game usually appear between the evening before and a few hours before it starts. The page keeps its address and says the board is empty rather than padding itself with props nobody is offering.
NBA, NFL, MLB and WNBA — the four leagues with a scoring model behind them. A sport with no box-score history loaded here cannot get a hit rate or a ranking, so it is not offered rather than offered thinly.
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Odds and lines come from licensed data feeds and refresh on a schedule; hit rates, edges and grades are Parlay Builder’s own calculations.