updated 6:44 p.m. ET Sept. 18, 2008

NEW YORK - Miami Heat rookie Michael Beasley was fined $50,000 by the NBA on Thursday after acknowledging that he was involved in an incident involving teammate Mario Chalmers and Memphis’ Darrell Arthur at the Rookie Transition Program this month.

The NBA said Beasley, the No. 2 overall pick, originally failed to cooperate with the league investigation of the matter. The Heat said Beasley eventually chose to reveal that he was part of the incident.

Chalmers and Arthur, former Kansas teammates, were fined $20,000 apiece last week after being banished from the rookie symposium. They were found in a room at the resort where the event was taking place with two women — which violated NBA policy for the event. Security at the resort said the scent of marijuana was detected, but no drugs or drug paraphernalia were found, and Chalmers and Arthur both insisted they were not using any illegal substances.

Beasley’s involvement in the incident is not clear. He filed papers to dissolve the relationship with his agent, Joel Bell, last week, and was not available for comment Thursday.

“While we are disappointed with Michael’s involvement, we are pleased that he chose to come forward and stand with his teammate and accept the consequences of his actions,” Heat president Pat Riley said in a statement. “We are hopeful that both Michael and Mario have learned from this experience and we will have no further comment on the subject.”

None of the three players will be suspended by the league. Chalmers and Arthur will have to repeat the symposium, which teaches incoming NBA players how to handle the on- and off-court rigors of life in the league, next summer.

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