The simplified point of this statement is true, Terry Rozier did tell his close friend, Dinero Laster, that he was planning on leaving a game because of injury. Laster had been receiving non-public information on Rozier's health status and selling it to sports gamblers.
Primary Source 1: https://www.nytimes.com/interactive/2025/10/23/nyregion/nba-betting-scheme-indictment.html New York Times published some court documents from the indictment. Skimming through it, there's lots of information on the defendants, information, evidence, and events. The documents explore the twisted and complicated history of the sports betting scam and the people involved. There is not really a questionable bias with this source as it is just court documents. The documents support the claim that Rozier was underperforming for financial benefit, even using the word "underperforming" in the indictment.
Secondary source 1: https://nypost.com/2025/10/23/sports/the-exact-moment-terry-rozier-allegedly-threw-game-for-200k/ This article is kind of a primary as well as a secondary source because it contains a video of the incident, but also discusses it. The video is of the moment Rozier allegedly faked an ankle injury, which he had informed Laster he was planning on doing. The NBA was not aware of any injury report prior. Laster then sold this information to buyers. This source seems to have a bias toward Rozier being maliciously involved in the gambling situation, which can even be seen in the headline. The headline reads "The exact moment Terry Rozier allegedly threw game for $200k". The words "exact moment" being right next to "allegedly" does give some suspicious of bias or clickbait-esque motivation. I also don't see anything in the court documents about Terry Rozier receiving $200k from anyone from this game, which the headline implies. Nothing contradicts the original claim.
Secondary source 2: https://www.si.com/nba/video-shows-terry-rozier-subtle-move-before-allegedly-faking-injury-for-gambling-ring There is not much to say about this source as it is pretty much just videos of the game where Rozier was removed due to an injury.