In a stunning turn of events, Dallas Mavericks rising star Cooper Flagg has been suspended indefinitely from all basketball activities after testing positive for a banned substance during a recent league-administered screening.
The NBA confirmed the news in a brief statement this afternoon, citing violations of the league’s Anti-Drug Program**. While officials have not yet disclosed the specific substance involved, the suspension takes immediate effect and leaves Flagg ineligible to participate in team practices, preseason preparations, and the upcoming 2025–26 season until further notice.
The Mavericks organization issued a short response:
> “We are aware of the NBA’s decision regarding Cooper Flagg and are gathering more information. The Dallas Mavericks are committed to upholding the league’s standards and will have no further comment until the review process is complete.”
A Rising Star’s Setback
At just 18 years old, Cooper Flagg entered the NBA with massive expectations as one of the most highly-touted rookies in recent memory. Drafted by the Mavericks to help solidify their forward rotation alongside Luka Dončić and Kyrie Irving, Flagg’s combination of size, athleticism, and skill had fans and analysts predicting a rapid rise to stardom.
His indefinite suspension is a major blow to Dallas’s plans for the upcoming season, particularly after a strong showing in the Summer League, where he averaged double-digit points and showcased elite defensive instincts.
What Happens Next
Under NBA policy, indefinite suspensions for substance violations often require the player to complete a rehabilitation program, submit to additional testing, and receive clearance from the league before returning. Depending on the investigation’s findings, Flagg could face a suspension ranging from several months to over a full season.
The league’s statement suggests that Commissioner Adam Silver may provide further clarification in the coming days. Meanwhile, the Mavericks will need to adjust their rotation and possibly pursue free-agent signings or trades to fill the gap left by Flagg’s absence.
Reactions from the Basketball World
News of the suspension spread quickly across social media, with fans expressing a mix of shock, disappointment, and support for the young player:
ESPN analyst Adrian Wojnarowski called it “a stunning early-career setback for one of the league’s most promising young talents.”
Several of Flagg’s high school and Team USA teammates posted messages of encouragement, urging him to “keep his head up” and focus on returning stronger.
As of press time, Flagg has not released a public statement, but sources close to the situation indicate that his camp is preparing a formal response and may dispute aspects of the league’s findings.
This is a developing story — further updates will be provided as more details become available.
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