The NBA is reviewing league policies to ensure players know gambling's "dire risks" according to a league memo reportedly sent to teams Monday in the wake of a betting scandal.

The memo, obtained and revealed by ESPN, came four days after FBI agents arrested Miami Heat guard Terry Rozier and Portland head coach Chauncey Billups among others as part of a sports gambling and betting investigation.

Both were put on administrative leave by the NBA and each has denied wrongdoing through lawyers.

The league said in the memo it had started "reviewing league policies regarding injury reporting, the training and education of all NBA personnel, and safety measures for NBA players," according to the ESPN report.

"With sports betting now occupying such a significant part of the current sports land

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