The N.B.A. is cracking down on tampering. Just not the kind of tampering most fans would expect.

The Milwaukee Bucks were fined $50,000 for violating rules “governing the timing of discussions regarding future player contracts and permissible commitments to players,” the league office announced Tuesday.

The fine stems from a public statement made by Jon Horst, the general manager of the Bucks, who recently said in a public television appearance that their star player and winner of last season’s Most Valuable Player Award, Giannis Antetokounmpo, would be offered a “supermax” extension from the team next summer.

The remarks came in a question-and-answer session with fans this month. Horst was asked about the “long-term situation” of Antetokounmpo’s contract.

“First of all, the answer for right now is we can’t talk and negotiate anything,” Horst said. “So Giannis, basically, a year from now, will be eligible for a supermax extension. At that time, of course, he will be offered a supermax extension.”