The 11:00–13:00 Injury Report Window — Reading NBA Health Updates Like a Trader
Available in US
For ten years the NBA injury report was a moving target. Teams could file at strange hours, update sporadically, and the gap between filing and tip-off left punters guessing about a star’s availability halfway through the afternoon. That changed in October 2025. The league mandated a new injury reporting window of 11:00 to 13:00 local time on game day, with public report updates at least every fifteen minutes. For a UK punter this is a structural advantage hidden in plain sight — once you adjust for time zones, the window becomes the most productive two hours of the prop research day.
What the 2025 update actually changed
The change came on the heels of the October 2025 federal indictments that reshaped how the league thinks about prop integrity. As part of the league’s response, NBA teams now have to refile injury lists on game day during the 11:00 to 13:00 local time window, with mandatory public refresh of the injury report every fifteen minutes once that window opens. Adam Silver framed the broader integrity reform around exactly this kind of surface — making sure the information sportsbooks and the public consume is timely, accurate, and not exploitable by anyone with insider proximity. “It’s too easy to manipulate something which seems otherwise small and inconsequential to the overall score,” Silver said while discussing the prop reforms, and the injury window is the league’s mechanism for closing the timing gap that bad actors had exploited.
For UK punters the practical effect: every day at 11:00 local US time — which is anywhere from 16:00 to 19:00 UK time depending on the venue and the daylight savings overlap — there is a structured information dump that previously did not exist. Books receive the same dump, but the books have to reprice hundreds of props simultaneously, and during the first 30 to 60 minutes after the update there is meaningful lag between what the report says and what the prop lines reflect.
The other piece of the update: teams now have to maintain the report through to tip-off with status changes published within fifteen minutes of any decision. Late scratches still happen, but the dark zone between the last filing and the tip-off has been compressed dramatically.
Reading the status codes without overinterpreting
The injury report uses a small set of status codes, and the codes mean specific things. Misreading them is the most common error I see in casual punters who treat any “questionable” tag as a coin flip.
“Out” means out. There is no sliding-scale interpretation here — if a player carries the OUT tag at the 11:00 filing, he is not playing, and his prop markets should already be voided or settled by the time you check. Books usually pull markets within minutes of the OUT confirmation; if a market on an OUT-listed player is still active, do not bet it on the assumption that it will void — bet only if you actually intend to take the position with the player removed.
“Doubtful” historically translates to roughly an 80 per cent chance of not playing. Books treat it almost like OUT for pricing purposes — they reduce the player’s projected minutes drastically and reprice all his props as if he is unlikely to suit up. If you see a doubtful star with prop lines still active and meaningfully high, the book is signalling more confidence in his return than the public report does. That is sometimes a signal worth following.
“Questionable” is the messiest tag. Across a long sample, questionable players play approximately 70 to 75 per cent of the time, but the rate varies wildly by team, by player, by injury type and by the reporting culture of the specific franchise. Questionable for a star with a back tightness on a Wednesday is not the same probability as questionable for the same star on a back-to-back with a tweaked hamstring. Reading the underlying injury description matters more than reading the tag.
“Probable” was effectively retired from formal injury reporting some seasons ago and is now rare. When it does appear, it almost always means the player will play; books price it that way.
“Game-time decision” means exactly what it says — the call will not be made until warmups. These situations are where late scratches happen, and where prop bets settle in unpredictable ways. Always read the operator’s specific late-scratch settlement rules before taking any prop on a GTD player.
Late scratches, prop settlement, and the rules that vary
The settlement rules around late scratches are not standardised across UK operators, and the differences matter on the margin. Most UKGC-licensed bookmakers void player props if the player is scratched before tip-off. Most also void if the player exits before logging a stated minimum number of minutes — usually two, sometimes three. Below that threshold, the bet is voided and your stake is returned.
Above the threshold, the bet stands. This is where the trap lives. A star who plays four minutes, tweaks something during a possession and walks to the locker room never to return will see his over props settled as losses on whatever stat lines he was on. The book’s logic: he played the minimum, the line is live, the result is the result. From a punter’s perspective this is brutal, but it is the rule, and reading it before the bet matters more than reading it after.
The biggest variation across UK books is on combined props like PRA. Some operators void the entire PRA market on a sub-threshold scratch; others continue to settle the bet based on whatever production happened in the partial minutes. Always check the rules tab before staking PRA on a GTD-listed player.
Same-game bet builders have their own complication. If a leg gets voided, most UK operators continue the bet builder with the remaining legs at a recalculated price. This means your bet builder might transform mid-flight from a five-leg ticket into a four-leg ticket at a different price than you originally took. The math usually works in your favour because a void typically removes a leg you were paying vig on, but the recalculated price can sometimes look quite different from what you pictured at slip submission.
How to use the injury report to find prop value
The window is most productive in the first 60 to 90 minutes after the 11:00 local-time filing. That is when the public is digesting the news, the books are repricing in batches, and the gap between the underlying truth and the published price is widest.
The strongest signal is a star moving from probable or questionable to OUT during the window. The replacement player’s usage rate is about to climb sharply — minutes, usage and matchup can collectively shift expected stat output by 20 to 30 per cent on any given night, and an unexpected starter absorbing a 30 per cent usage star’s possessions sees his own expected output spike on the order of 25 to 35 per cent. The book’s first reprice of the replacement’s lines is usually conservative, because the algorithm is uncertain whether the replacement will fully step into the role. Within an hour, the public will catch on and the lines will move further. The window between the first reprice and the second is where a sharp punter takes the over on the new starter at value.
The second signal is a star moving from OUT to questionable, or from questionable to probable. Books are slower to update upward when an injury status improves than they are downward when it worsens — partly because the asymmetric risk profile of an active star prop is bigger than the algorithmic assumption of a healthy player. The over-side of a star coming back from injury is sometimes underpriced for the first afternoon, and that asymmetry pairs naturally with the broader strategy framework where minutes and usage do most of the projection work — see our breakdown of usage rate for NBA prop bets.
The third signal is the one that requires the most discipline: when there is no signal. If the injury report at the close of the window shows nothing surprising on a player you were planning to bet, the value has already been priced in. The books had two hours to digest a stable status, and the line is now efficient. Walking away from a market is a valid play, and the discipline of doing so on no-signal days is what separates serious in-play players from compulsive ones.
When exactly does the NBA injury report drop on game day?
The mandatory public refresh window is 11:00 to 13:00 local time of the game’s venue, with updates at least every fifteen minutes through to tip-off. For UK punters this maps to roughly 16:00 to 23:00 UK time depending on which venue is hosting and the daylight savings overlap.
What happens to my prop bet if a player is scratched at warm-up?
Most UKGC-licensed bookmakers void the bet and return your stake if the scratch happens before tip-off, or if the player exits before logging the operator’s stated minimum minutes — typically two minutes. Above that threshold the bet stands and is settled on whatever production the player generated. Always check the specific operator’s rules tab before staking on a game-time decision player.
Created by the ”nba Best Player Prop Bets” editorial team.
